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What is Understanding the Circulatory System about?
The circulatory system consists of arteries, veins, and capillaries that transport blood throughout the body. Arteries carry blood away from the heart under high pressure, while veins return blood to the heart under lower pressure, aided by valves and skeletal muscle. Capillaries, with their thin walls, facilitate the exchange of materials between blood and tissues.
- Author
- merhanhuu
- Language
- EN