Exchange between blood and interstitial fluid occurs across capillaries and, to a lesser extent,

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Exchange between blood and interstitial fluid primarily occurs across capillaries due to their thin walls and high permeability. Venules, which are small veins that collect blood from capillaries, also participate in this exchange to a lesser extent. Arterioles, arteries, veins, and metarterioles are not primarily involved in the direct exchange of substances with the interstitial fluid.

Exchange Between Blood and Interstitial Fluid Occurs Across Capillaries And