Histomorphological and Histochemical Study of Macula Densa in Guinea Fowl (Numida meleagris) Kidney

The juxtaglomerular apparatus usually located at the vascular pole of nephrons, which comprises afferent and efferent arterioles along with a specialized form of cells known as macula densa. The elliptical-shaped macula densa originated from the convoluted part of distal tubule in a closely packed cellular mass. The macula densa is located at the exclusive spot stuck between afferent and efferent arterioles, wherein the salt concentration found with high variability. This macula densa believed to be performed as the renal sensor elements which could control many physiological functions like glomerular hemodynamic and renin secretion. Different staining procedures were employed while confirming different micro-morphological elements of macula densa. Different histoenzymic observations were also perceived during the attempt of present studies.