Egestion of food, Biology

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EGESTION

  1. To give out undigested food from alimentary canal.
  2. Faeces can remain in colon for 36 hrs. then moving into rectum by gastro-colic reflex.
  3. Faeces consists of 3/4 H O & 1/4 solid.
  4. In solid part 3% bacteria, 30% roughage, 20% fat, 15% inorganic and 3% protein.
  5. Dead mucosal cells, mucous, cholesteroal also present. NH3, CH4 are negligible.
  6. Brown colour is due to stercobilin & Stercobilinogen.
  7. Foul smell is due to sketol, Indol & treptophan.

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