Question

Question :-
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Explain the process of absorption of food.
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Answer 1

AnsWer :

• The digested forms of food enter the blood in the inner lining of the digestive tract. This is called absorption.

• Water, inorganic salts and some glucose is absorbed by the inner wall of the stomach.

• Rest of the absorption is done by the small intestine.

• The villi increase the area of absorption.

• Glucose and fructose are absorbed into the blood vessels.

• They are absorbed by osmosis, diffusion and active absorption.

• Amino acids are absorbed by the blood vessels.

• Fatty acids and glycerol are absorbed in the lymph capillaries or lacteals.

• Fatty acids are first incorporated into small droplets called micelles which move into intestinal mucosa.

• They are reformed into very small protein coated fat globules called chylomicrons. These are transported to lacteals.

• They enter the lacteals and get absorbed in the lymph. From lacteals, they are carried to blood vessels.

Answer 2

$\Large{\boxed{\overline{\underline{\mathfrak{AnSwEr:-}}}}}$

$\star{\underline{\underline{\bf{ What \: is \: Absorption \: ?}}}}$

✧ Absorption is the process by which nutrient molecules are taken into the cells of a living organism.

$\large{\underline{\underline{\bf{ Process:-}}}}$

☆ Absorption takes place in small intestine. There is no absorption in mouth and very little occurs in stomach. The presence of villi on the inner surface area of the small intestine and microvilli on the free surface of the intestinal epithelial cells considerably enhance the absorptive capacity of the small intestine.

☆ The absorbed food, brought to the liver is diverted to various metabolic channels to reach each and every cell of the body, where it is utilised for obtaining energy, building up new tissues and repair of old tissues. However, a portion of absorbed food is stored in the liver and other tissues for emergency.

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