What are the three regions of large intestine

The ileum opens into the large intestine, which is much wider than the small

intestine.

It has the following three regions:

• Caecum

- It is a small sac-like structure where the ileum joins the large intetine.

- It harbours certain symbiotic micro-organisms.

- A narrow finger-like projection called appendix arises form here.

- The caecum opens into the colon.

• Colon

- Colon is also distinguishable into three parts- an ascending part, a

horizontal/transverse part and a descending part.

- The descending part opens into the rectum through sigmoid colon.

• Rectum

- Rectum is the last part of the large intestine.

- It is a sac-like structure, where the faecal matter is stored.

- It opens to the outside through the anus.