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Published byIris Jefferson Modified over 8 years ago
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The Urinary System
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Function 1.Remove nitrogenous wastes 2.Maintain electrolyte, acid-base, and fluid balance of blood 3.Homeostatic organ 4.Acts as blood filter 5.Release hormones: calcitriol & erythropoietin
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Kidneys as Filters Kidneys filter 180 liters (50 gal) of blood/day 178-179 liters are reabsorbed back into blood Excrete a protein free filtrate
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Nitrogenous Wastes ammonia urea uric acid
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Organs of the Urinary System kidneys ureters urinary bladder urethra
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renal capsule renal cortex renal medulla renal pelvis renal pyramids ureter Kidney Anatomy
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urine blood filtration tubular reabsorption and secretion Nephron Functioning “refreshed” blood
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renal cortex renal medulla Each kidney contains over 1 million nephrons and thousands of collecting ducts Collecting duct Loop of Henle PCT DCT Glomerulus
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Glomerular Filtration afferent arteriole glomerulus efferent arteriole Bowman’s capsule Filters blood; proteins can’t pass through
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Composition of Glomerular Filtrate WaterWater Small Soluble Organic MoleculesSmall Soluble Organic Molecules Mineral IonsMineral Ions color- affected by what we eat: salty foods, vitamins
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Odor- normal is ammonia-like diabetes mellitus- smells fruity or acetone like due to elevated ketone levels diabetes insupidus- yucky asparagus--- vegetarian diet- urine is alkaline protein rich and wheat diet- urine is acidic
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Urinary Bladder ureters internal sphincters external sphincters urethra
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Thank you. S.Karunakar Reddy,PGT Biology, A.P.R.SCHOOL(BC)GIRLS, KLKY.
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