03 excretion

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03 excretion

  1. 1. Excretion removal of metabolic waste does not include feces feces is what your body did not use, therefore not metabolic waste
  2. 2. Urine solution of metabolic waste urea and uric acid salts organic compounds water fluid for urine comes from filtered blood and extracellular fluid (ECF) which surrounds cells
  3. 3. Urea product of two other waste molecules ammonia, NH3 carbon dioxide, CO2 Where does the ammonia come from? amine group from amino acids
  4. 4. Ammonia deamination – removal of amine group ammonia released when liver breaks down proteins 0.005 mg NH3 is lethal reacts with CO2 to produce less toxic urea 100 000x less toxic than NH3
  5. 5. Uric Acid product of nucleic acid breakdown specifically of purine bases uric acid released through liver metabolism
  6. 6. Role of Kidneys urea and uric acid are filtered through the kidney average person loses 2L of liquids a day suggested to consume 2L H2O / day
  7. 7. Excretion: Ameoba Ameoba remove waste through a contractile vacuole.
  8. 8. capillary network bladder collection tubule nephrostome nephridiopore
  9. 9. Excretion: Fish Fish can excrete ammonia directly through their gills.
  10. 10. Excretion: Birds Birds excrete uric acid directly with feces.

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