Excretion
removal of metabolic waste
does not include feces
feces is what your body did not use, therefore not

metaboli...
Urine
solution of metabolic waste
urea and uric acid
salts
organic compounds
water

fluid for urine comes from filtere...
Urea
product of two other waste molecules
ammonia, NH3
carbon dioxide, CO2

Where does the ammonia come from?
amine grou...
Ammonia
deamination – removal of amine group
ammonia released when liver breaks down proteins
0.005 mg NH3 is lethal
react...
Uric Acid
product of nucleic acid breakdown
specifically of purine bases

uric acid released through liver metabolism
Role of Kidneys
urea and uric acid are
filtered through the
kidney
average person loses 2L
of liquids a day
suggested to c...
Excretion: Ameoba
Ameoba remove
waste through a
contractile vacuole.
capillary
network
bladder
collection
tubule

nephrostome

nephridiopore
Excretion: Fish
Fish can excrete
ammonia directly
through their gills.
Excretion: Birds
Birds excrete uric acid
directly with feces.
03 excretion
03 excretion
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03 excretion

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Transcript of "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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