| mesangium | A central part of the renal glomerulus between capillaries; mesangial cells are phagocytic and for the most part separated from capillary lumina by endothelial cells. Origin: mes-+ G. Angeion, vessel Extraglomerular mesangium, mesangial cells that fill the triangular space between the macula densa and the afferent and efferent arterioles of the juxtaglomerular apparatus. Synonym: polkissen of Zimmermann. (05 Mar 2000) |
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| glomerular mesangium | The thin membrane which helps to support the capillary loops in a renal glomerulus. (12 Dec 1998) |
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