nephron structure And Functions | Class 12 Biology скачать в хорошем качестве

nephron structure And Functions | Class 12 Biology

About This Video! Nephron: The functional units, nephrons, in human kidneys are arranged along two distinct regions, an outer cortex and an inner medulla. The nephrons arranged along the cortex are called as cortical, however, those arranged along the border of cortex and medulla with their tubular system looping deep in inner medulla are juxtamedullary nephrons These juxtamedullary nephrons are speciically instrumental in the production of concentrated urine In each nephron inner end forms a cup-shaped swelling, called Bowman’s capsule and it is around a ball of capillaries called glomerulus. Glomerulus circulates blood through capsule as it arrives through aferent arteriole and leaves the capsule by eferent arteriole. The blood vessel subdivides again into another network of capillaries, the peritubular capillaries. Bowman capsule continues as extensively convoluted proximal tubule, loop of Henle and the distal tubule, which empties into collecting tubules. The collecting tubules open into pelvis. The iltrate from glomerulus passes through these structures and is processed ultimately for urine formation. The peritubular capillaries intermingle with proximal and distal tubules of the nephron. In juxtamedullary nephrons additional capillaries extend down to form a loop of vessels, vasa recta.