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CBSE 7th class science lesson 2


N C m 10th Jul, 2025
Answer (1)
Chelsie G 10th Jul, 2025

This chapter explains how animals, including humans, obtain and digest food.

  • Different Modes of Feeding – Animals show different feeding habits: herbivores, carnivores, omnivores.

  • Steps in Nutrition in Humans:

    • Ingestion – Taking in food

    • Digestion – Breaking down food

    • Absorption – Nutrients enter blood

    • Assimilation – Use of nutrients by body

    • Egestion – Removal of waste

  • Human Digestive System:
    Includes mouth, oesophagus, stomach, small intestine, large intestine, rectum, and anus. Each part has a specific function in digestion.

  • Role of Enzymes: Enzymes help in breaking down food into simpler substances.

  • Animals have different ways of obtaining and digesting food, but all follow basic steps like ingestion, digestion, absorption, and egestion.


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