Heart Chalk Walk Reflection

In the heart, the deoxygenated blood that comes from the body enters through either the superior or inferior vena cava. It then enters the right atrium and goes through the tricuspid valve, where it comes into the right ventricle. When the right ventricle if full, it flows through the pulmonary valve to go to the pulmonary artery, which takes it to the lungs to be oxygenated. After returning from the lungs through the pulmonary veins, the blood enters the left atrium to then be pushed through the bicuspid valve to the left ventricle. Once the left ventricle is full, it gets pushed through the aortic valve to the aorta, where the oxygenated blood is spread throughout the body.

https://www.youtube.com/watch?v=rHQEsz4CwBg&feature=youtu.be