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From there, the blood leaves the heart through the aorta to be distributed throughout the body. Blood enters the heart through the superior and inferior venae cavae into the right atrium. This blood then flows through the right atrioventricular valve to the right ventricle.
Explain the blood flow through the body. 1  As blood is pumped away from the heart, it travels through the aorta to arteries, aterioles, and the capillary beds.  Blood flow through the capillary beds reaches almost every cell in the body and is controlled to divert blood according to the body's needs.