Definition of Juxtaglomerular apparatus

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Juxtaglomerular apparatus: The prefix "juxta-" comes from the Latin preposition meaning near, nearby, close.

The juxtaglomerular apparatus is a collective term referring to the cells near a structure called the glomerulus in the kidney. The juxtaglomerular cells are specialized cells that stimulate the secretion of the adrenal hormone aldosterone and play a major role in renal autoregulation, the kidney's self-governance.