The Human Body Major Systems & Organs - The Circulatory System

The video explains the human circulatory system, comparing it to a fuel distribution network. It details the heart's structure, including its chambers and valves, and describes the blood circulation process, highlighting the oxygenation of blood. The heart's automatic function, controlled by the nervous system and its internal pacemaker, is discussed. The video also covers the roles of arteries and veins in distributing blood throughout the body.

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