Nutrition in humans
- Mouth includes teeth, salivary glands, and tongue. Teeth break down the food. They are of four types – molars (6), premolars (4), canines (2), and incisors (4) in each jaw.
- Molars and premolars are for chewing and grinding food.
- Canines are for piercing and tearing food.
- Incisors are for cutting and biting food.
- In total life span of humans, two sets of teeth grow – milk teeth and permanent teeth.
- Saliva is secreted by salivary glands located under the tongue. It contains a digestive enzyme salivary amylase, which breaks down starch into sugar.
- Tongue helps in chewing and swallowing of food.
- The food from mouth passes …
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