Caption: Cell filtration is demonstrated as material passes through a blood vessel. Filtration generally occurs across capillary walls. Like diffusion, filtration is a passive process involving a gradient. But in this case, the gradient is a pressure gradient, in which cardiovascular pressure pushes the fluid containing solutes from the higher-pressure area to the lower pressure area. Some functions of the liver and kidneys, including the formation of urine, are based on filtration. It should be noted that, indirectly, this process consumes a tremendous amount of energy to maintain the pressure gradient.

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Keywords: cell, cell membrane, filtration, interstitial fluid, intracellular fluid, molecule, passive transport

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Cell filtration

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