A capillary network is a group of capillaries, the smallest blood vessels in the body, that connect arteries to veins.These networks form dense, branching pathways through tissues, allowing efficient exchange of substances between the blood and body cells. The capillaries have walls only one cell thick, enabling oxygen, carbon dioxide, nutrients, and waste products to diffuse in and out of the blood easily. This exchange is essential for keeping cells healthy and maintaining proper body function. Capillary networks ensure that nearly all tissues receive a continuous supply of oxygen and nutrients while removing waste products like carbon dioxide.
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