mechanism of urine formation
urine formation involves four stages glomerular filtration, tubular reabsorption, tubular secretion, concentration of urine. blood flows from renal artery to glomerulus through efferent arteriole. blood is filtered in bowman's capsule. waste products nutrients and water filtered in bowman's capsule. peritubular network around pct ri observe all useful components of primary urine. pet tubular network secrets waste products into the urinary tubule. 75% of water reabsorbed in pct region.10% of water filtrate the area of loop of henle.vasopressin hormone is secreted only when concentrated urine is to be passed out.deficiency of vasopressin causes excessive, repeated, dilute urination called diabetes insipidus.
urine passes in uratus through peristaltic movement. urine is stored in urinary bladder after 300 to 800 ml.
ek treat urine from viratra known as micturition.urine contains 96% of water 2.5 % of organic substances and 1.5% of inorganic solutes.
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