How the Heart Works: Diagram of Heart Blood Flow
Cardiovascular System Anatomy and Physiology
Pathway of Blood in the Heart
Circulation of blood through the heart
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
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