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This illustration shows a representation of the circulation of the blood, in its essential features. The arrows indicate the course of the blood. a, arteries; aur., auricle or receiving portion of the heart; d, digestive tract; c. d., capillaries of the digestive tract; c.r., capillaries of the respiratory organs; c.s., capillaries of the system; va., valves; ve, veins; vt, ventricle.

Blood Circulation

This illustration shows a representation of the circulation of the blood, in its essential features.…

William Harvey discovered that blood circulates through the body in 1628.

William Harvey

William Harvey discovered that blood circulates through the body in 1628.