Capillaries are the blood vessels responsible for the exchange of essential materials between blood and tissues. Capillaries are the smallest and thin walled blood vessels involved in the diffusion of nutrients, hormones and gases into the tissue cells.
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Answer:
Capillaries are the blood vessels responsible for the exchange of essential materials between blood and tissues. Capillaries are the smallest and thin walled blood vessels involved in the diffusion of nutrients, hormones and gases into the tissue cells.
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Explanation:
small blood vessels or pipelines which carry blood in body.!!