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EXCRETION (kidneys (funtions (Excrete metabolic waste products like urea,…

- - - - small molecules removed from blood in ultrafiltration
      - useful substances taken back into bloodstream in selective reabsorbtion ensuring the maintanance of the blood plasma
    - - the regulation of water and solute concentration in the blood to maintain a constant water potential
      - ADH secreted by the pituitary gland controls the amount of water reabsorbed at the kidneys
  - - - each nephron consists of
        
        bowmans capsule contaning glumerulous
        
        proximal convoluted tubule
        
        loop of henle
        
        distal convulated tubule
        
        severl nephrons open into a collecting duct
  - - - containing a dialysis fluid
        
        contain same concentration of essential substances as healthy blood
        
        does not contain metabolic waste
        
        flows in opposite direction as blood