Tuesday, 25 November 2014
Biological Molecules Lab
Lipid Test
Firstly we got the 5 food items that we would be testing on
These included, Cheese, bread, dried apricot, cracker and apple, from left to right. These were rubbed in oil and left for a period of time. After removing the food from the oil we found out that the Cheese was the only food item that tested positive. The ones that remained unchanged were negative for the test
Starch Test
For the Starch test we chose the same 5 food items. The items we needed were the plate with the depressions on them with the food placed in them. After we placed the food in them, we then placed Iodine solution of 2 drops each on the food and waited 2-3 minutes to see which food items would turn black. As you can see from the photo the food that tested positive were the ones that turned black which are the cracker and the bread. The ones that were negative were the ones that remained unchanged.
Sugar test
For the sugar test we again used the same food samples. The equipment needed for the test was 5 test tubes, test tube rack, beaker, heater, Benedict solution. We first put the food items into labelled test tubes. From left to right it was, Apple, cheese, apricot, bread and the cracker. We put distilled water into each of the 5 test tubes and then proceeded to put 10 drops of Benedict solution in them. After we put the drops in, we then put the test tubes in the boiling water for about 5-10 minutes for speed up in reaction time. Once we had taken them out we found out the the cheese, apricot and bread all tested positive for sugar as their color changed into an orange color. The ones that tested negative remained a light blue.



Firstly we got the 5 food items that we would be testing on
These included, Cheese, bread, dried apricot, cracker and apple, from left to right. These were rubbed in oil and left for a period of time. After removing the food from the oil we found out that the Cheese was the only food item that tested positive. The ones that remained unchanged were negative for the testStarch Test
For the Starch test we chose the same 5 food items. The items we needed were the plate with the depressions on them with the food placed in them. After we placed the food in them, we then placed Iodine solution of 2 drops each on the food and waited 2-3 minutes to see which food items would turn black. As you can see from the photo the food that tested positive were the ones that turned black which are the cracker and the bread. The ones that were negative were the ones that remained unchanged.Sugar test
For the sugar test we again used the same food samples. The equipment needed for the test was 5 test tubes, test tube rack, beaker, heater, Benedict solution. We first put the food items into labelled test tubes. From left to right it was, Apple, cheese, apricot, bread and the cracker. We put distilled water into each of the 5 test tubes and then proceeded to put 10 drops of Benedict solution in them. After we put the drops in, we then put the test tubes in the boiling water for about 5-10 minutes for speed up in reaction time. Once we had taken them out we found out the the cheese, apricot and bread all tested positive for sugar as their color changed into an orange color. The ones that tested negative remained a light blue.



Friday, 14 November 2014
Colon Cancer
Watching the colon cancer surgery was not easy to look at but it indeed was pretty interesting. It was much easier to just simply look at the photos rather than watch the video.
Initially what I was surprised to see was that the patient allowed himself to be filmed and which is scary because anything could have gone wrong. The most amazing part of the surgery was the fact that little cameras were placed into the delicate area of surgery which allowed the doctors to see and for us as well! The most interesting thing to me is how the stitches were put on the body part, this seems like it would be so delicate and the fact that you can puncture it is crazy.
Initially what I was surprised to see was that the patient allowed himself to be filmed and which is scary because anything could have gone wrong. The most amazing part of the surgery was the fact that little cameras were placed into the delicate area of surgery which allowed the doctors to see and for us as well! The most interesting thing to me is how the stitches were put on the body part, this seems like it would be so delicate and the fact that you can puncture it is crazy.
Friday, 7 November 2014
Broken Collar bone
- Rests between the upper rib cage and the scapula (shoulder blade) and is an important bone, as it attaches the arm to the body
- Car accidents also frequently lead to clavicle fractures, as a result of impact with either the seat belt, steering wheel or from bracing against the dashboard with extended arms.
INTERESTING FACT
- Babies can even suffer clavicle fractures during passage through the birth canal, but fortunately the bones of children and infants heal extremely quickly.
- No surgery is needed if it's a non-displaced fracture and both sides of the clavicle are still lined up properly; an arm sling usually suffices.
Tuesday, 4 November 2014
Presentation on Hookah smoke
Many people today talk about the affects of cigarette smoke on the smokers lungs and how your lungs will become damaged and how it can lead to cancer sand all those things. However, what about the hookahs? They are just as, if not more toxic in our respiratory system in about every way. They have the same toxins, shisha has more nicotine and it is becoming more common amongst high schools.
What is hookah though? Hookah is a water pipe with flavored tobacco than can range from strawberry to grape. It creates smoke in large amounts and is one of the reasons teenagers think it is cool.
What are the risks? Hookah is associated with lung cancer, respiratory illness, low birth weight and periodontal disease. Smokers inhale higher amounts of toxins than in cigarettes. In a 1 hour long session, it involves around 200 puffs where the average for cigarette is 20 puffs.
My personal reflection with hookahs was that I lived in an Arab Country, Qatar and the city of Dubai where doing shisha was common. Everyone was doing it wherever they pleased and nobody says anything. I personally did it every weekend with my friends and it was not until this project i realized the risks.
Observations: The test tube with the lime water with O2 being pressed into it was kept the same where as the test tube with the lime water where we were blowing into with a straw turned cloudy after a period of time.
Once we put distilled water into the 25ml in beaker, we did the same thing with the pipette and straw and then used the PH indicator. The one with the straw turned yellow and the one that was airrated was green
Once we put distilled water into the 25ml in beaker, we did the same thing with the pipette and straw and then used the PH indicator. The one with the straw turned yellow and the one that was airrated was green
Sunday, 26 October 2014
Monday, 20 October 2014
Fitness testing
Fitness tests
Long Jump: 2.40
Stairs: 4.87 seconds
Plank: 4 minutes 15 seconds
Push ups: 57Wall Sit: 3 minutes
50 M sprint: 6.5 seconds
Best 6 test
1. aerobic fitness: lunges
2. anaerobic Glycolysis: step ups
3. ATP CP: 50m sprint
4. Flexibility: Splits
5. Power: long jumps
6. Agility: box drill
Specific Goal
Try to reach 14.0 on the beep test and this means that I will be improving my stamina
Long Jump: 2.40
Stairs: 4.87 seconds
Plank: 4 minutes 15 seconds
Push ups: 57Wall Sit: 3 minutes
50 M sprint: 6.5 seconds
Best 6 test
1. aerobic fitness: lunges
2. anaerobic Glycolysis: step ups
3. ATP CP: 50m sprint
4. Flexibility: Splits
5. Power: long jumps
6. Agility: box drill
Specific Goal
Try to reach 14.0 on the beep test and this means that I will be improving my stamina
Wednesday, 15 October 2014
Interm
Hi Mom and Dad!
This is my interim report for the Human Kinetics Coop.
So far, the highlights for me have been: Doing practical work using hands rather than all theory work and I believe this helps me do my work and learn more. Having good friends in the class which make my learning experience more fun
I am the most proud of: Most proud of my ability to perform well in Super fit and push my self to my limits
The most interesting things I have learned about are: The heart and all the components inside the heart especially the dissection
An example of when I really pushed myself in SuperFit is: On the beep test and the plank. I pushed my self to keep on going and making sure that I do not give up.
I could make improvements in: Focusing better in class and making sure I listen to the teacher better
I am really looking forward to: More field trips and more practical work
The Basics - WORK HABITS:
Attendance (classes missed and why) - G
Participation in field trips (woo kim, grouse grind, rock climbing) - missed 1, so G
Lates (how many & reasons) - G
Preparedness for class (gym strip &/or supplies) - G
Class time management (are you using your class time to complete your work? engaged in class discussion? participating? following along? doing your best? or talking too much? ) - S
Blog assignment completion - (out of 8 assignments) Comments? S
Self evaluation of work habits for each class in coop - G/S/N - G
Biology 12:
Exercise Science 12:
Super Fit 12:
This is my interim report for the Human Kinetics Coop.
So far, the highlights for me have been: Doing practical work using hands rather than all theory work and I believe this helps me do my work and learn more. Having good friends in the class which make my learning experience more fun
I am the most proud of: Most proud of my ability to perform well in Super fit and push my self to my limits
The most interesting things I have learned about are: The heart and all the components inside the heart especially the dissection
An example of when I really pushed myself in SuperFit is: On the beep test and the plank. I pushed my self to keep on going and making sure that I do not give up.
I could make improvements in: Focusing better in class and making sure I listen to the teacher better
I am really looking forward to: More field trips and more practical work
The Basics - WORK HABITS:
Attendance (classes missed and why) - G
Participation in field trips (woo kim, grouse grind, rock climbing) - missed 1, so G
Lates (how many & reasons) - G
Preparedness for class (gym strip &/or supplies) - G
Class time management (are you using your class time to complete your work? engaged in class discussion? participating? following along? doing your best? or talking too much? ) - S
Blog assignment completion - (out of 8 assignments) Comments? S
Self evaluation of work habits for each class in coop - G/S/N - G
Biology 12:
Exercise Science 12:
Super Fit 12:
Tuesday, 14 October 2014
Our trip to the Grouse Grind
At the beginning of the grouse grind I felt confident yet I was really sore from the workouts and practices that had been done in the previous days. As I started, my mindset was that "this is going to be really hard". As I progressed I made sure to never stop and keep moving even if it is in slow paces. I ended up only stopping one time and that was to take my shirt off due to the heat and sweat I was feeling. I ended up with a time of 52 minutes, much better than my previous 1 hour and 6 minutes. I though I would do bad but I ended up finishing amongst some of the first!
Tuesday, 7 October 2014
My VO2 max
After calculating my VO2 max according to the beep test, I found out that it was 54.3
This means that I have physically fit and able to run in high intensity
This means that I have physically fit and able to run in high intensity
Friday, 3 October 2014
Heart dissection
1. The most surprising thing was how thick the left ventricle was compared to the right ventricle.
2. The Atria are smaller then the ventricles because the ventricles have to pump the blood to the body/lungs rather that just having to collect blood and pass it through to the ventricles which is what the atria do.
The ventricles are muscular whereas the atria are flimsy and thin.
3. The left ventricle is thicker and more muscular than the right ventriclebecause it pumps blood at a higher pressure. The right ventricle is triangular in shape and extends from the tricuspid valve in the right atrium to near the apex of the heart.
4. As the heart muscle contracts and relaxes, the valves open and shut, letting blood flow into the ventricles and atria at alternate times. The following is a step-by-step description of how the valves functionnormally in the left ventricle
Thursday, 25 September 2014
Workout
Workout started at 8 am and lasted till 10 am. I worked out at the YMCA and did Chest and Legs. The workout went as followed;
Chest
1. Dumbell bench press. 3 sets of 10 reps starting with 25 and increased to 30 lbs
2. Pec fly. 3 sets of 10 reps. Starting at 115 and increased to 145 lbs
3. Bench press. 3 sets of maximum amount able to do. starting at 30 lbs and went up to 40 lbs
4. Chest press. 3 sets of 10 reps. Starting at 50 lbs and up to 75 lbs
Legs
1. Squats. 3 sets of 10 reps. Starting at 45 lbs and going down to 30 lbs
2. Bar lunges. 3 sets of 10 reps. Starting at 24 lbs and went up to 35 lbs
3. Incline leg press. 3 sets of 10 reps. Starting at 1 plate and moved on to 2 plates each side
4. Normal leg press. 3 sets of 10 reps. Starting at 80 and went up to 105 lbs. Alternating by 1 leg press and switch and then both legs
4. quad pull down. 3 sets of 10 reps. Starting at 60 lbs
Stretch
Consisted of flexibility and using the rollers to stretch out legs and being more flexible
Chest
1. Dumbell bench press. 3 sets of 10 reps starting with 25 and increased to 30 lbs
2. Pec fly. 3 sets of 10 reps. Starting at 115 and increased to 145 lbs
3. Bench press. 3 sets of maximum amount able to do. starting at 30 lbs and went up to 40 lbs
4. Chest press. 3 sets of 10 reps. Starting at 50 lbs and up to 75 lbs
Legs
1. Squats. 3 sets of 10 reps. Starting at 45 lbs and going down to 30 lbs
2. Bar lunges. 3 sets of 10 reps. Starting at 24 lbs and went up to 35 lbs
3. Incline leg press. 3 sets of 10 reps. Starting at 1 plate and moved on to 2 plates each side
4. Normal leg press. 3 sets of 10 reps. Starting at 80 and went up to 105 lbs. Alternating by 1 leg press and switch and then both legs
4. quad pull down. 3 sets of 10 reps. Starting at 60 lbs
Stretch
Consisted of flexibility and using the rollers to stretch out legs and being more flexible
Tuesday, 23 September 2014
About Me
ASAD AMIR
Things about me
Things about me
- Born in LA
- Lived in Surrey 6 years before moving to Toronto
- 2 years in Milton, Ontario
- Moved to Qatar
- Went to a British School
- Played on Qatar National Basketball team
- Moved to Dubai
- Play basketball and go to the gym on my spare time
- Hang out with a couple good friends
- Volleybal, football also
Thursday, 23 January 2014
Evolution of peppered moth
The peppered moth is a prime example of how evolution happens in our world with animals. In the past, before the industrial revolution, white peppered moths dominated the region near building cities and towns. Almost 98% of the moths were of this kind and only 2% were the black moths. This all drastically changed with the industrial revolution. This revolution of course was the creation of large factories that created building material that makes up our cities and towns today. The factories were a huge Negetive towards the environment due to the late amounts of pollution making light areas dark. What this did was it allowed the white moths to be more visible to predators and which then resulted in the % of white moths to drop down to nearly 5%! The number of black peppered moths increased insanely! This was because Now the blackened area by pollution was used as camouflage for those black moths and there % went up to 95! It crazy how evolution can effect a species isn't it?
Saturday, 18 January 2014
FIRST FINAL QUESTION!
Phylum Nematoda, (example, roundworm)
This Phylum is a diverse one with many organisms living in different environments. There are about 25000 different animals within this group and more than half are parasitic. The one that we looked into and dissected was the Round Worm. There are certain requirements for a living thing to actually be classified as "living". There are 6 requirements that need to be met. The first is, "is the thing composed of cells?". In the case of the round worm, in the epidermis there is a single layer of cells, underneath the epidermis is the muscle cells and they also have nerve cells that are supported with the nervous system. The second expectation is "Living things are in levels of organization". Round worms have a Nervous System, Excretory system, and a digestive system all containing different specialized cells allowing for the animal to live. The third requirement is "living things require energy". Round worms, like humans, use food as there source of energy. They consume mucus, intestinal lining, bacteria and fungus. The 4th requirement is "living things respond to their environment". Round worms do this with sensory organs. They have sensory hairs and papillae which give the worm a sense of touch. Round worms do have brains which allow the worm to sense danger and go towards food. The 5th requirement is that "living things grow". Round worms can grow from feeding on other things such as bacteria and fungus and mucus. The 6th living thing is that "living things reproduce". Round worms mate with other female roundworms by fertilizing there sperm and the egg.
Evolution: They have evolved to have an unidirectional digestive system. Food is taken from the mouth, processed in a long tube where nutrients are absorbed into tissues.
Dissection: The dissection for this roundworm in all honesty was my least favourite as it was the least interesting. But even then a learning experience came from it and that was to see how these little parasites can work. The insides of the roundworm were laced with its long intestine tubes which we had to move in order to see the actual organs that the worm possesses. It also smelt pretty gross :/
Phylum Annelida, (Example, Earthworm)
This phylum consists of organisms such as earthworms, segmented worms, leeches and lug worms. These are found at moist terrestrial environments. There are over 2000 species in this phylum. The Annelid that we studied was an earthworm. The earthworm can be classified as a living thing because it fits all the requirements of a living thing. The earthworm is composed of cells just like every other living thing. We know this because if the organism didn't have cells then the whole animal would not be able to function and things such as the digestive system would not be effective as cells and other substances are secreted. The earthworm is classified in different levels of organisation as just like roundworms, they have a nervous system, digestive system and a excretory system. Earthworms require energy in the form of food also like the roundworms. They eat soil that includes dead remains of organisms and nutrients that lay in the ground. Earthworms respond to their environment by sensory organs much like the roundworms, which identify different vibrations, light and danger. Earthworms also grow from the nutrients that they eat from the soil. The segments that make up the worm can become larger and larger with more intake of food to contain all that they eat. Earthworms reproduce by a different method of dividing it self into to and they then reproduce to make identical offspring and this process is call meiosis.
Evolution: Have evolved from the ocean to live on land where the feeding for the worm is greater and this allows them to live longer and pass genes on to the next generation.
Dissection: Was not present for the dissection. However I did take some notes from other blogs on what the dissection was like.
- Had a long tube where most or all the organs were located around
-food that was undigested was still inside the worm
Phylum Arthropod (example, Grasshoppers)
Description on Phylum: Arthropod have an exoskeleton and joint appendages in their visual appearance. These animals in this phylum have been adapted to live in almost any type of environment and are very suitable for doing so. They range greatly in size from plankton to large crabs
Feeding: The Grasshopper is a herbivore, meaning that it only eats plants and vegetation rather than meat like other animals. They feed on farmers crops which is a big negative for farmers who are trying to make a living.
Respiration: Breathe through holes called spiracles that are hidden behind the wings of the Grasshopper. The air enters the holes through the front and exits from the back.
Reproduction: Grasshoppers reproduce sexually through meiosis. The female lays about 10-25 eggs on a layer of foam she secretes. The offspring will shed 5-6 times after being born and then will wander into the environment and continue the cycle.
Digestive system: Grasshoppers break down food in different phases. Firstly, the food goes into the foregut where saliva breaks it down, and then it gets passed on to the mid gut where a digestive juice called caecae does absorption to get the food out.
Nervous System: controlled by Ganglia, which is a loose group of nerve cells.
Evolution: the Grass hopper has evolved tremendously and is a species that is well adapted for humans to study and learn how evolution works. Grasshopper are prey for many predators in the wild and over years the slower and ones that cannot fly would be eaten and not pass on their genes. Therefore, the ones that could fly and that would jump higher and faster would survive and pass on their genes to the future grasshoppers.
The dissection: was very tough at time to crack through the hard surface of the skin that the grasshopper possesses. We first found out if the animal was female or male by looking if it had a digger at the back, which is used by females to dig into the soil to lay their eggs.
Phylum Echinodermata, (example, Starfish)
Description: Marine animals. Adults have radial symmetry and are found at every ocean depth.
Feeding: The starfish can turn its stomach inside out and lay it self on its prey, crushing it and taking out all the juices it needs.
Reproduction: Both sexually and asexually. Special species can reproduce broken parts of itself which is basically asexual reproduction.
Breathing: Contain Papulae which are circular dots around the starfish which allow oxygen from water and also tube feet that serve the same purpose.
Digestive System: In the pyloric stomach digestive enzymes are secreted to help in the absorption of nutrients. A starfish's diet includes small fishes, clams, and algae.
Nervous System: The central nervous system of a starfish consists of a radial nerve running the length of each ray.
- There is nerve rings that connect the radial nerves.
- Most of the senses go straight to the radial nerves as that is where the Star fish is centrally controlled.
Evolution: Unfortunately for humans, star fish disintegrate into the ocean bed once they die, therefore not leaving clear evidence for the evolution of the star fish and to see which species of it has evolved to survive in the ocean. This is something common with a lot of the species within this phylum.
Dissection: Was not present when we did this dissection so I watched a video on it and also looked at other blogs to see what it was like for my own personal gain of knowledge.
My classmates found the star fish to be very squishy, and a lot of "mush" on the inside. The outer layer was said to contain small dots which I learned were for breathing.
Phylum Vertebrata, (example, Grass Frog)
Description: All the animals in this phylum have backbones. Range in size from little frogs like the grass frogs, to the largest whale in the ocean, the blue whale. They make up 4% of all species in the world.
Feeding: When the frog is young, (tadpole), it only eats algae and other small plants. As the frog gets bigger and the digestive system demands more food, it becomes only a carnivore feeding on flies and other small insects by using its tongue to grasp its prey.
Circulation: Frogs have three-chambered hearts. Oxygenated blood from the lungs and de-oxygenated blood from the respiring tissues come into the heart and are separated by atriums. The aorta takes in oxygenated blood and the pulmonary artery for the de-oxygenated blood. There are special barriers just like in humans that prevent the back flow of blood and so the 2 types do not mix
Reproduction: Frogs are the type of species where the female lays eggs on a slimy layer in the water and the male frog comes and fertilizes them.
Respiration: Breathe through lungs. Absorb water through skin when underwater, allowing them to breathe underwater.
Digestive System: Use digestive enzymes in stomach and then food moves on to small intestine and large intestine to be excreted.
Nervous System: Has brain, spinal cord and many sensory nerves. It resembles the human brain in a way because of the high amount of complexity that is involved.
Evolution: Frogs were once sea mammals that only swam and acquired food in water. Over time, the frog has evolved to find food on land as there was not enough in the sea. They evolved to grow feet and legs to attain food and these frogs obviously would go on to live healthier and longer, passing on their genes to the next generation.
Dissection (THE CLICHE THING TO DO EH?): I was unfortunately not present for this dissection as it was said to be on of the fan favs according to my classmates. What surprised me when I saw picture of this dissection was how similar our insides are to the frog! It is almost scary to think that everything that is inside the frog is a minified version of what is inside of us. Crazy!
This Phylum is a diverse one with many organisms living in different environments. There are about 25000 different animals within this group and more than half are parasitic. The one that we looked into and dissected was the Round Worm. There are certain requirements for a living thing to actually be classified as "living". There are 6 requirements that need to be met. The first is, "is the thing composed of cells?". In the case of the round worm, in the epidermis there is a single layer of cells, underneath the epidermis is the muscle cells and they also have nerve cells that are supported with the nervous system. The second expectation is "Living things are in levels of organization". Round worms have a Nervous System, Excretory system, and a digestive system all containing different specialized cells allowing for the animal to live. The third requirement is "living things require energy". Round worms, like humans, use food as there source of energy. They consume mucus, intestinal lining, bacteria and fungus. The 4th requirement is "living things respond to their environment". Round worms do this with sensory organs. They have sensory hairs and papillae which give the worm a sense of touch. Round worms do have brains which allow the worm to sense danger and go towards food. The 5th requirement is that "living things grow". Round worms can grow from feeding on other things such as bacteria and fungus and mucus. The 6th living thing is that "living things reproduce". Round worms mate with other female roundworms by fertilizing there sperm and the egg.
Evolution: They have evolved to have an unidirectional digestive system. Food is taken from the mouth, processed in a long tube where nutrients are absorbed into tissues.
Dissection: The dissection for this roundworm in all honesty was my least favourite as it was the least interesting. But even then a learning experience came from it and that was to see how these little parasites can work. The insides of the roundworm were laced with its long intestine tubes which we had to move in order to see the actual organs that the worm possesses. It also smelt pretty gross :/
Phylum Annelida, (Example, Earthworm)
This phylum consists of organisms such as earthworms, segmented worms, leeches and lug worms. These are found at moist terrestrial environments. There are over 2000 species in this phylum. The Annelid that we studied was an earthworm. The earthworm can be classified as a living thing because it fits all the requirements of a living thing. The earthworm is composed of cells just like every other living thing. We know this because if the organism didn't have cells then the whole animal would not be able to function and things such as the digestive system would not be effective as cells and other substances are secreted. The earthworm is classified in different levels of organisation as just like roundworms, they have a nervous system, digestive system and a excretory system. Earthworms require energy in the form of food also like the roundworms. They eat soil that includes dead remains of organisms and nutrients that lay in the ground. Earthworms respond to their environment by sensory organs much like the roundworms, which identify different vibrations, light and danger. Earthworms also grow from the nutrients that they eat from the soil. The segments that make up the worm can become larger and larger with more intake of food to contain all that they eat. Earthworms reproduce by a different method of dividing it self into to and they then reproduce to make identical offspring and this process is call meiosis.
Evolution: Have evolved from the ocean to live on land where the feeding for the worm is greater and this allows them to live longer and pass genes on to the next generation.
Dissection: Was not present for the dissection. However I did take some notes from other blogs on what the dissection was like.
- Had a long tube where most or all the organs were located around
-food that was undigested was still inside the worm
Phylum Arthropod (example, Grasshoppers)
Description on Phylum: Arthropod have an exoskeleton and joint appendages in their visual appearance. These animals in this phylum have been adapted to live in almost any type of environment and are very suitable for doing so. They range greatly in size from plankton to large crabs
Feeding: The Grasshopper is a herbivore, meaning that it only eats plants and vegetation rather than meat like other animals. They feed on farmers crops which is a big negative for farmers who are trying to make a living.
Respiration: Breathe through holes called spiracles that are hidden behind the wings of the Grasshopper. The air enters the holes through the front and exits from the back.
Reproduction: Grasshoppers reproduce sexually through meiosis. The female lays about 10-25 eggs on a layer of foam she secretes. The offspring will shed 5-6 times after being born and then will wander into the environment and continue the cycle.
Digestive system: Grasshoppers break down food in different phases. Firstly, the food goes into the foregut where saliva breaks it down, and then it gets passed on to the mid gut where a digestive juice called caecae does absorption to get the food out.
Nervous System: controlled by Ganglia, which is a loose group of nerve cells.
Evolution: the Grass hopper has evolved tremendously and is a species that is well adapted for humans to study and learn how evolution works. Grasshopper are prey for many predators in the wild and over years the slower and ones that cannot fly would be eaten and not pass on their genes. Therefore, the ones that could fly and that would jump higher and faster would survive and pass on their genes to the future grasshoppers.
The dissection: was very tough at time to crack through the hard surface of the skin that the grasshopper possesses. We first found out if the animal was female or male by looking if it had a digger at the back, which is used by females to dig into the soil to lay their eggs.
Phylum Echinodermata, (example, Starfish)
Description: Marine animals. Adults have radial symmetry and are found at every ocean depth.
Feeding: The starfish can turn its stomach inside out and lay it self on its prey, crushing it and taking out all the juices it needs.
Reproduction: Both sexually and asexually. Special species can reproduce broken parts of itself which is basically asexual reproduction.
Breathing: Contain Papulae which are circular dots around the starfish which allow oxygen from water and also tube feet that serve the same purpose.
Digestive System: In the pyloric stomach digestive enzymes are secreted to help in the absorption of nutrients. A starfish's diet includes small fishes, clams, and algae.
Nervous System: The central nervous system of a starfish consists of a radial nerve running the length of each ray.
- There is nerve rings that connect the radial nerves.
- Most of the senses go straight to the radial nerves as that is where the Star fish is centrally controlled.
Evolution: Unfortunately for humans, star fish disintegrate into the ocean bed once they die, therefore not leaving clear evidence for the evolution of the star fish and to see which species of it has evolved to survive in the ocean. This is something common with a lot of the species within this phylum.
Dissection: Was not present when we did this dissection so I watched a video on it and also looked at other blogs to see what it was like for my own personal gain of knowledge.
My classmates found the star fish to be very squishy, and a lot of "mush" on the inside. The outer layer was said to contain small dots which I learned were for breathing.
Phylum Vertebrata, (example, Grass Frog)
Description: All the animals in this phylum have backbones. Range in size from little frogs like the grass frogs, to the largest whale in the ocean, the blue whale. They make up 4% of all species in the world.
Feeding: When the frog is young, (tadpole), it only eats algae and other small plants. As the frog gets bigger and the digestive system demands more food, it becomes only a carnivore feeding on flies and other small insects by using its tongue to grasp its prey.
Circulation: Frogs have three-chambered hearts. Oxygenated blood from the lungs and de-oxygenated blood from the respiring tissues come into the heart and are separated by atriums. The aorta takes in oxygenated blood and the pulmonary artery for the de-oxygenated blood. There are special barriers just like in humans that prevent the back flow of blood and so the 2 types do not mix
Reproduction: Frogs are the type of species where the female lays eggs on a slimy layer in the water and the male frog comes and fertilizes them.
Respiration: Breathe through lungs. Absorb water through skin when underwater, allowing them to breathe underwater.
Digestive System: Use digestive enzymes in stomach and then food moves on to small intestine and large intestine to be excreted.
Nervous System: Has brain, spinal cord and many sensory nerves. It resembles the human brain in a way because of the high amount of complexity that is involved.
Evolution: Frogs were once sea mammals that only swam and acquired food in water. Over time, the frog has evolved to find food on land as there was not enough in the sea. They evolved to grow feet and legs to attain food and these frogs obviously would go on to live healthier and longer, passing on their genes to the next generation.
Dissection (THE CLICHE THING TO DO EH?): I was unfortunately not present for this dissection as it was said to be on of the fan favs according to my classmates. What surprised me when I saw picture of this dissection was how similar our insides are to the frog! It is almost scary to think that everything that is inside the frog is a minified version of what is inside of us. Crazy!
Tuesday, 7 January 2014
The Tongue Eating Louse
One of the most gross and bizarre beings in the Arthropods species is the tongue eating louse. This is a parasite like no other. This parasite lives in the Gulf of California and has a scientific name of Cymothoa Exigua. What these nasty parasites do is they enter the host fish called the spotted nose snapper through the fins of the fish. Several male will enter and some will become female. The female lice will travel to the fish's mouth where it attaches to the tongue. Once on, the blood supply will be cut off forcing the tongue to fall off. Now what is really strange and messed up about this arthropod is that it will join it self with the remaining muscle of the tongue and become the fish tongue it self. It feeds off blood, mucus and algae that is in the mouth of the host. The other male lice will only stay in the gill chamber for some time where it can either travel to a new host or mate with a female to attach to a new tongue. This Tongue eating louse is the only known parasite which acts act s as an organ of the host. Very Interesting.
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