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The circulatory system transports nutrients, gases, hormones, and wastes throughout the body via blood vessels and blood. Blood is composed of plasma, red blood cells, white blood cells, and platelets. Red blood cells carry oxygen and carbon dioxide via hemoglobin. The heart pumps blood through arteries, veins, and capillaries, ensuring exchange of these materials between tissues and organs. The heart has four chambers to fully separate oxygenated and deoxygenated blood in mammals and birds.
- Author
- Mariella Singson
- Language
- EN