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