Question

what is large intestine

Answer 1

Large intestine, posterior section of the intestine, consisting typically of four regions: the cecum, colon, rectum, and anus

Answer 2

$\huge\text{\underline{Large\:intestine:}}$


Large intestine consists of:

=> $\sf{\underline{Caecum}}$

=> $\sf{\underline{Colon}}$

=> $\sf{\underline{Rectum}}$


$\text{\underline{(i)\:Caecum:}}$

It is a small blind sac which hosts some symbiotic micro-organisms.

Vermiform appendix arises from the caecum is vestigial in human being.

This caecum opens into the colon.


$\text{\underline{(ii)\:Colon:}}$

The colon is divided into three parts, an ascending, a transverse and a descending part.

This descending part of colon opens into rectum.

Ascending colon is the smallest part and lacks mesentery.


$\text{\underline{(iii)\:Rectum:}}$

It is the last part of alimentary canal.

It is the storage site for faecal matter.

It opens outside through anus.


$\text{\underline{NOTE:}}$

Wall of colon has sac like haustra.

Histologically, wall of colon has 3 bands of longitudinal muscles called taeniae coli.

Another characteristic of colon surface is the presence of small fat filled projections called epiploic appendages.