Function of Kidney

• Urea is formed in the liver from excess amino acids

  
• Alcohol, drugs & hormones are broken down in the liver

  
• Cortex: contains Bowman’s capsules and coiled tubules

  
• Ureter: carries urine from kidney to bladder

  
• Medulla: contains loops of Henlé and collecting ducts

  
• Loop of Henlé: selectively absorbs water/solutes

  
• Collecting ducts: reabsorbs water into blood and store wastes until they are passed into ureter

  
• Urethra: carried urine from bladder to the outside.

  
• Bladder: stores urine

  
• Renal capsule: filters from blood: water, glucose, urea and salts.

  
• Tubule: (yellow) reabsorbs 100% of glucose, most of the water and some salts back into the blood (red), leading to concentration of urea in the urine as well as loss of excess water and salts into the tubule.

  
• Renal artery: brings wastes and water from blood

  
• Renal vein: reabsorbs water and useful molecules and leaves wastes behind

  
• The kidney removes urea & excess water, and re-absorbs glucose and some salts