Excretory system

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Excretory system

  1. 1. THE EXCRETORY SYSTEM Controlling the Internal Environment
  2. 2. Gross Anatomy of System• Pair of kidneys – Retroperitoneal• Pair of ureters• Urinary bladder• Urethra
  3. 3. Gross Anatomy
  4. 4. Location of Kidneys Retroperitoneal
  5. 5. Retroperitoneal Location
  6. 6. The Kidney Pyramid Papilla Cortex MedullaHilum Column Calyx Pelvis Ureter
  7. 7. Functions of Excretory System• Regulate body fluids – Volume, pH, composition• Remove metabolic wastes from blood• Control rate of RBC formation• Regulate blood pressure• Regulate absorption of calcium
  8. 8. Nephron PCTBowman’s DCTcapsule Vasa recti Glomerulus Ascending Descending tubule Tubule Collecting duct
  9. 9. The Blood Supply to the Kidney
  10. 10. Renal Corpuscle
  11. 11. Renal Corpuscle
  12. 12. Podocyte and the Filtration Process
  13. 13. Renal Corpuscle
  14. 14. Function of Renal Corpuscle• Bowman’s capsule• Glomerulus – Filtration of blood • Water • Electrolytes • Glucose • Urea
  15. 15. Filtration Slits
  16. 16. Nephron
  17. 17. TubulesProximal Tubule Distal Tubule
  18. 18. Function of Tubules• Reabsorption of glucose – Proximal convoluted tubule• Reabsorption of water – PCT, descending tubule, collecting duct• Reabsorption of salts – PCT, ascending tubule, distal con. tub.• Reabsorption of urea – PCT, collecting duct
  19. 19. Collecting DuctsCuboidal Epithelium lining ducts
  20. 20. Nepron with Vasa Recta
  21. 21. Function of Tubules• Reabsorption of glucose – Proximal convoluted tubule• Reabsorption of water – PCT, descending tubule, collecting duct• Reabsorption of salts – PCT, ascending tubule, distal con. tub.• Reabsorption of urea – PCT, collecting duct

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