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Human Nutrition

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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