1.

Explain anatomy of different parts of Large Intestine.

Answer»

Ileum opens into large intestine.

It is 1.5 meters in length. 

It is wider in diameter and shorter than small intestine. 

It consists of caecum, colon and rectum.

1. Caecum:

  • Caecum is a small, blind sac present at the junction of ileum and colon.
  • It is 6cm in length. 
  • It hosts some symbiotic microorganisms. 
  • An elongated worm like vermiform appendix arises from the caecum.
  • Appendix is vestigial organ in human beings and functional in herbivorous animals for the digestion of cellulose.

2. Colon: 

  • Caecum opens into colon. 
  • Colon is tube like-organ consist of three parts, ascending colon, transverse colon and descending colon.
  • The colon is internally lined by mucosal cells. 

3. Rectum: 

  • It is posterior region of large intestine. 
  • It temporarily stores the undigested waste material called faeces till it is egested out through anus.


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