MEDT220 Lecture Notes - Lecture 7: Purine Metabolism, Sphincter, Radiography

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Nitrogenous waste products are released by cells that break down protiens: urea. Need to remove wastes from blood to prevent build up. Main functions: filter nitrogenous wastes to form urine. Composed of water, salts, and acids: degrade and eliminate hormones from blood. Insulin and parathyroid hormone: balance water, electrolytes, and acids in body fluids. Necessary for muscle and nerve cell function. Bodys abaility to maintain equilibrim inside its internal environment: secrete hormones. Kidneys: lie retroperitoneal on either side of the spine in the lumbar region, surrounded by adipose and fibrous connective tissue for protection, weighs 4-6 ounces, two regions. Outerconcave, hollow depression on the border of the kidney. Ureters: muscular tubes carry urine by peristaltic waves from kidneys to bladder. Urinary bladder: hollow muscular sac, temporary reservoir for urine 300-500 ml, trigone. Triangular region at the base of the bladder where ureters enter and urethra exit.

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