Question

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give reasons
1 villi are present in the small intestine 2.mucus is secreted in stomach
3.ORS is given during diarrhoea ​

Answer 1

Explanation:

3. ORS is the giving of fluid by mouth to prevent and/or correct the dehydration that is a result of diarrhoea.Made up with clean water the ORS drink contains the main elements that are lost from the body during diarrhoea. It is effective in treating dehydration resulting from all types of acute diarrhoeal diseases.

2. It acts as part of a barrier that protects the stomach wall from the acid and digestive enzymes within the stomach lumen.Mucus is secreted by the stomach epithelial cells, but the mucus is mainly secreted from foveolar cells, found in the necks of the gastric pits.

1. Villi are specialized for absorption in the small intestine as they have a thin wall, one cell thick, which enables a shorter diffusion path. They have a large surface area so there will be more efficient absorption of fatty acids and glycerol into the blood stream.

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Answer 2

1.Villi are tiny finger like projections present on the walls of small intestine because when the digested food passes in small intestine villi help to absorb the food.Villi help by increasing the surface area the intestine has for absorption .

2.Mucus is secreted in the stomach by epithelial cells. Mucus is secreted in stomach because HCL and other dangerous juices may damage the walls of stomach. Mucus protects the walls of stomach by acting as a barrier.

3.ORS [oral rehydration salts] is given to a patient suffering from diarrhoea . ORS solution enables the intestine to absorb the fluid and the salts more efficiently.