Page 4 - ppt1

MOUTH

The process of digestion begins in our mouth.

Teeth - break the food into smaller pieces.

Salivary glands- produces saliva in our mouth.

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Sal i v a i s t he w at er y s ubs t ance pr oduced i n t he s al i i i var y gl ands of t he
Saliva is the watery substance produced in the salivary glands of the
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mouths of some animals, including humans. Saliva is 98% water .

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Saliva softens the food and the amylase present in saliva breaks down the
S a l i va so f t e n s t h e f o o d a n d t h e a m y l a se p r e se n t i n sa l i va b r e a ks d o w n t h e
insoluble starch present in the food into soluble sugars.
amylase
Starch ----------------- sugars
Tongue- helps to mix the food with the saliva.