Blood vessels supply nutrients and oxygen from "summary" of Bd Chaurasia's Human Anatomy, Volumes 3 & 4 by B. D. Chaurasia
Blood vessels play a crucial role in the human body by supplying essential nutrients and oxygen to various tissues and organs. These vessels are responsible for transporting oxygenated blood from the heart to all parts of the body, ensuring that each cell receives the necessary oxygen for cellular respiration. Additionally, blood vessels also deliver vital nutrients such as glucose, amino acids, and fatty acids to cells for energy production and growth. The network of blood vessels in the body consists of arteries, veins, and capillaries, each with a specific function in the circulation of blood. Arteries carry oxygen-rich blood away from the heart to different parts of the body, while veins return oxygen-depleted blood back to the heart for reoxygenation. Capillaries, on the other hand, facilitate the exchange of gases, nutrients, and waste products between the blood and tissues. The walls of blood vessels are composed of several layers, including the tunica intima, tunica media, and tunica externa, each with unique structural characteristics to support the flow of blood. The tunica intima is the innermost layer, consisting of endothelial cells that provi...
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