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The Urinary System. Function 1.Remove nitrogenous wastes 2.Maintain electrolyte, acid-base, and fluid balance of blood 3.Homeostatic organ 4.Acts as blood.

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Presentation on theme: "The Urinary System. Function 1.Remove nitrogenous wastes 2.Maintain electrolyte, acid-base, and fluid balance of blood 3.Homeostatic organ 4.Acts as blood."— Presentation transcript:

1 The Urinary System

2 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

3 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

4

5 Nitrogenous Wastes ammonia urea uric acid

6 Organs of the Urinary System kidneys ureters urinary bladder urethra

7 renal capsule renal cortex renal medulla renal pelvis renal pyramids ureter Kidney Anatomy

8 urine blood filtration tubular reabsorption and secretion Nephron Functioning “refreshed” blood

9 renal cortex renal medulla Each kidney contains over 1 million nephrons and thousands of collecting ducts Collecting duct Loop of Henle PCT DCT Glomerulus

10 Glomerular Filtration afferent arteriole glomerulus efferent arteriole Bowman’s capsule Filters blood; proteins can’t pass through

11 Composition of Glomerular Filtrate WaterWater Small Soluble Organic MoleculesSmall Soluble Organic Molecules Mineral IonsMineral Ions color- affected by what we eat: salty foods, vitamins

12 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

13 Urinary Bladder ureters internal sphincters external sphincters urethra

14 Thank you. S.Karunakar Reddy,PGT Biology, A.P.R.SCHOOL(BC)GIRLS, KLKY.


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