During capillary exchange, this pressure causes the fluids to return to the capillary bed at the venule end
Added by Montserrat H.
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Step 1: Understand the concept of capillary exchange, which involves the movement of fluids and solutes between the blood in capillaries and the surrounding tissues. Show more…
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Exchange of nutrients, gases, and waste molecules occurs across capillary walls. Fluid is also exchanged. Most of the fluid is moved by hydrostatic pressure, which, in turn, is due to the pressure differences between the capillary fluid and interstitial fluid. Blood pressure, a type of hydrostatic pressure, is due to blood volume and the pressure generated by contraction of the ventricles. This pressure forces fluid out of the capillaries, especially at the end of the capillary. The blood within the capillaries contains plasma proteins that cannot leave the blood regardless of any concentration gradient between the blood and the tissue fluids. These molecules are responsible for the colloid osmotic pressure, which draws water into the capillaries, helping return fluids at the end of the capillary.
Adi S.
What is taken up by the capillaries at their venous end?
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