Nutrition > 2.5 (Reabsorption of Water and Defaecation)

Reabsorption of water :)
1. The main function of the large intestine is to reabsorb water.
2. The substances that enter the large intestine consist of water and undigested food substances like cellulose from the fibre of vegetables and fruits.
3. Water is reabsorbed from these undigested food substances.

Defaecation :)
1. Undigested food in the large intestine is expelled as faeces through the process of defaecation.
2. Faeces that reach the rectum are made up of undigested food substances. The faeces accumulate in the rectum.
3. When the rectum is full of faeces, it undergoes peristalsis and assisted by abdominal contractions, will push the faeces through the anus to be expelled.
4. If an individual has problem in passing motion, he or she is said to be constipated.
5. Constipation occurs due to lack of water and roughage in the diet.
(isdatul asyifa)