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LU3: EXCRETION (Types of Excretory System (3. Malpighian tubules (Insects…

- - - - Ureotelic (Mammals, amphibians, sharks, & some bony fishes)
    - - Uricotelic (Reptiles, birds, insects, land snails)
    - - Ammonotelic (Mostly aquatic animals, eg: bony fishes)
- - - - Gills: Active absorption of NaCl
      - Kidney: Excretion of dilute urine
    - - Gills: Active secretion of NaCl
      - Kidney: Excretion of MgSO4-, urea, little water
- - - - Energy is supply by Na-K ATPase pump on basolateral surface.
    - - Collecting duct (carries filtrate from medulla to renal pelvis, toxic wastes eliminated but some urea & water reabsorbed)
    - - Pressure forces caused by heart's pumping action.