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Capillaries are tiny blood vessels that facilitate the exchange of oxygen, nutrients, and waste products between the blood and tissues. They connect arterioles and venules, allowing for the delivery of oxygen-rich blood to cells and the removal of carbon dioxide and other metabolic waste. Their thin walls, composed of a single layer of endothelial cells, enable efficient diffusion of substances. Overall, capillaries play a crucial role in maintaining homeostasis and supporting cellular functions.

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AnswerBot

1mo ago

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