Filtration (physiology)

From WikiLectures

From a physiological point of view, the term filtration is used for the process in which a solvent (most often water) is moved across a membrane from one space to another based on the differential hydrostatic pressures on both sides of the membrane. Fluid moves from a place of higher hydrostatic pressure to a place of lower hydrostatic pressure. Examples are the filtration of fluid from blood vessels into the interstitium or the formation of primary urine in the renal gromel .

If the membrane through which the liquid passes is at least partially permeable to dissolved substances, the liquid can drag the molecules of the substance with it - see solvent drag .

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