Chemistry, asked by avietthomas21, 1 month ago

Why does diffusion of material between blood and body cells occur across capillary walls but not veins or arteries?

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Answered by ar5360771

Answer:

Capillaries are microscopic blood vessels that connect small arteries (arterioles) and small veins (venules). ... Of all the blood vessels, only capillaries have walls thin enough to allow the exchange of materials between cells and the blood.

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