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Digestion and Absorption

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Write the parts of stomach of man and explain them.

Stomach : It is J shaped and present on the left side at anterior end of abdominal cavity posterior to diaphragm.

The stomach has four parts :

(1) Cardiac stomach : It is proximal part. The opening of oesophagus into cardiac stomach is guarded by cardiac sphincter which prevents the regurgitation of food.

Section of the stomach

(2) Fundus : It extends above cardiac aperture and is filled with air. The part of cardiac stomach which extends towards anterior end above level of cardiac aperture is called fundus.

(3) Body : It is the middle large part of the stomach.

(4) Pyloric stomach : It is the distal narrowest part of stomach which opens into duodenum. Its opening is guarded by pyloric sphincter which permits the passage of fine-food particles into duodenum.

Functions :

1. Food is temporarily stored in stomach for about 4 - 5 hours.

2. The digestion occurs in the stomach and only proteins are digested.

3. Churning of food occurs in the stomach.

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Name the fat soluble vitamins.

Vit A, D, E and  are fat soluble vitamins.
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What is the function of enamel in digestion?

The enamel helps in the mastication of food.
666 Views

What is the order of arrangement of teeth in each half of the upper and lower jaw ?

The order of arrangement of teeth in each half of the upper and lower jaw is I,C,PM,M.  I (incisors), C (cannine), PM (premolars), M (molars).
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What is Diphyodont ?

Diphyodont is the condition of having two set of teeth during the life of an organism. For example : humans are diphyodont as they have two set of teeth namely temporary milk or deciduous teeth which are replaced by permanent or adult teeth.

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What are Sanguivorous animals ?

The animals which suck blood e.g. leech, vampire bat, female mosquito etc.
1522 Views