What is the Hearts pumping action order?
Since the human circulatory system is a closed system, what is called the first step and so on is arbitrary. With that said, deoxygenated blood enters the right atrium of the heart via the venae cavae. Contraction of the atrium forces blood to the right ventricle. From there the order is pulmonary arteries, pulmonary veins, left atrium, left ventricle, and blood is pumped into the aorta. Valves and other details were omitted from this description.
