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The parts of the colon

Colon include: colon up , transverse colon , the colon down , sigmoid colon and rectum .

Physiological function of the colon

The colon ( large intestine ) is responsible for receiving the residue of digestion from the small intestine and then thrown them out. Before expelling part of the colon absorbs water from the residue that . If the function is poorly absorbed water content ( colon damaged by welding , increasing contractility ) will appear boiling stomach , abdominal pain , stool broken , loose , diarrhea . If more water absorption ( due to the heat , poor motility ) will lead to hard stool , constipation .

1 . Contractions of the colon :

- Contraction period : slowly , unevenly distributed saved helps the colon to digest and absorb water .

- Type of peristaltic contractions : occurs after eating 2 hours , depending on the intensity and type of food eaten . Depending on the day or night , night is almost no bowel motility . Every day there are 2-3 times as much for the fast and rectal stool ball down .

2 . Absorption :

- Water Absorption : 1.5 l per day buinh medium .

- Absorption Na : 50-200mEq/ngay .

- Absorption CL : 965mEq/ngay .

- Absorption K : 10mEq/ngay .

Bile salts play an important role in the absorption of water and electrolytes .

3 . Excretion :

Bicarbonate and potassium excretion .

4 . Digestion in the colon :

The food is not digested in the small intestine will all be digested spots in the colon by bacteria living in the colon .