2.5 Reabsorption of Water and Defecation

1. Large intestine (colon) does not secrete any enzyme
2. Water, minerals and vitamins are absorbed by the large intestine
3. Undigested and unabsorbed matter discharged as faeces through anus by the process of defecation.
4. Constipation is occur if diet lack of fibre and water.

Absorption of glucose through the Visking tube

Explanation:

•         Visking tube represents small intestine

•         Water represents bloodstream

Conclusion:

•         Amylase changes starch into glucose

•         Glucose can pass through semi-permeable membrane (Visking tube) while starch cannot

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