PLN 203 Lecture Notes - Lecture 12: Macula Densa, Ascending Limb Of Loop Of Henle, Renal Calyx
27 Apr 2017
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Document Summary
Functions of the urinary system: excretion removal of organic wastes from body fluids, elimination discharge of waste products, homeostatic regulation of blood plasma volume and solute concentration. The kidneys: are located on either side of vertebral column, position is maintained by, overlying peritoneum, contact with adjacent visceral organs, supporting connective tissues. Hilum: point of entry for renal artery and renal nerves, point of exit for renal vein and ureter. Blood supply to the kidneys: kidneys receive 20-25% of total cardiac output, kidney receives blood through renal artery. 1200ml of blood flows through kidneys each minutes. Segmental arteries: receive blood from renal artery, divide into interlobar arteries, which radiate outward through renal columns b/w renal pyramids, supply blood to arcuate arteries, which arch along boundary b/w cortex and medulla of kidney. Afferent arterioles: branch from each cortical radiate artery, deliver blood to capillaries supplying individual nephrons.
