Renal physiology describes how the kidneys maintain homeostasis by filtering blood, regulating pH, volume, pressure, and osmolality, and producing hormones through the structural organization of the nephron — the functional filtration unit composed of a renal corpuscle (glomerulus and Bowman's capsule) and a renal tubule (proximal convoluted tubule, loop of Henle, distal convoluted tubule, collecting duct). Filtration occurs through a selective barrier of endothelium, basement membrane, and podocyte filtration slits that permit water and small solutes to pass while excluding proteins and cells, and the resulting filtrate is progressively modified by reabsorption and secretion between the tubule lumen and peritubular capillaries. This anatomical and functional framework belongs to renal/urinary system physiology and links kidney structure to systemic regulatory functions, including blood pressure control via the renin-angiotensin pathway and the neuromuscular coordination of urine storage and voiding (micturition).
Renal physiology describes how the kidneys maintain homeostasis by filtering blood, regulating pH, volume, pressure, and osmolality, and producing hormones through the structural organization of the …