BIOLOGY CLASS 8th JUNE 2021

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The  dental formula of human is 2123/2123

The buccal cavity has 3pairs of salivary gland located at different locations
The parotid gland lies on the side of face.
Sub lingual gland under the front part of the tongue
Submaxillary gland lies at the angle of lower jaw.
These salivary glands secret saliva through their ducts.
Saliva contain water, salt, musings , ptyalin,
The ptyalin

Not to be noted
Carbohydrate - :
Commonly known as saccharides  also knows as sugar it has many types
Monosaccharides - one molecule of sugar eg. Glucose
Disaccharides - 2 Molecules of sugar eg. Sucrose,(from sugarcane) lactose(milk) , maltose(chapattis and in rice) sugarcane juice, sugar crystals
Poligosaccharides - 10 molecules of sugar
Polysaccharide - many sugar molecules eg. Starch,

Our cell receives only monosaccharides type of carbohydrate.
The enzyme ptyalin the starch and glycogen into maltose. Thus, carbohydrate digestion begins in the buccal cavity itself which is responsible for hydrolysis of about 30% starch present in food.

Enzymes present in saliva is salivary amylase also known as ptyalin


THANK YOU so much 

Dewanshu rai

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