MODULE 9: URINARY SYSTEM

• Urea:

  • A by-product of amino acid catabolism
  • The plasma concentration reflects the amount or protein in diet
  • It enters the renal tubules through glomerular filtration
  • It contributes to the reabsorption of water from the collecting duct
  • About 80% is recycled
• Uric acid:

  • Is a product of nucleic acid metabolism
  • It enters the renal tubules through glomerular filtration
  • Most reabsorption occurs by active transport
  • About 10% is secreted and excreted
• • Renal Artery
  • Interlobar Artery
  • Arcuate Artery
  • Interlobular Artery
  • Afferent Anteriole
  • Glomerular Capillaries
  • Efferent Anteriole
  • Petritubular Capillaries
  • Interlobular Vein
  • Arcuate Vein
  • Interlobal Vein
  • Renal Vein
• Renal Corpuscle

  Glomerulus

  • Filtration of water and dissolved from the plasma
  • Glomerular Capsule
  • Receives the glomerular filtrate