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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 a brief note on salivary glands. 

Salivary glands : There are three pairs of salivary glands in man. They secrete about 1 to 1.5 litres of saliva in 24 hours. Three pairs of salivary glands are :

1 .Parotid salivary glands : They are present on the sides of the face below and in front of ears. These are the largest salivary glands. They secrete saliva into the vestibule just opposite to the upper second molar teeth.

Write a brief note on salivary glands and gastric glands.

 Human salivary glands

2. Sublingual glands : These glands lie under the front part of the tongue. These secrete the saliva under the tongue by sublingual ducts.

3. Submaxillary glands : These glands are present at the angles of the lower jaw. These also secrete saliva below the tongue.



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. 


What are Sanguivorous animals ?

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

What is the function of enamel in digestion?

The enamel helps in the mastication of food.

Name the fat soluble vitamins.

Vit A, D, E and  are fat soluble vitamins.

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).