NCERT-Class 7-Science-Chapter-2-Nutrition in Animals

Nutrition in Animals

NCERT Class 7 Science Chapter-2-Notes,Solutions,Video,Tests, PDF

Theory

Nutrition

Topics to be learn :

  • DIFFERENT WAYS OF TAKING FOOD
  • DIGESTION IN HUMANS
  • DIGESTION IN GRASS-EATING ANIMALS
  • FEEDING AND DIGESTION IN AMOEBA

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Different ways of taking the food:

Name of Animals Kind of Food Mode of Feeding
Humming Bird Nectar Sucking
Human Beings Fruits, Vegetables Mouth (Chewing and Swallowing)
Snakes Rats Swallowing
Frogs Insects Swallowing (Sticky Tongue)
Earthworm Decaying Matter Swallowing (Muscular Pharynx)
Spiders Insects Grinding
Amoeba Tiny Food Particles Engulfing (Pseudopodia)
Hydra Insects and Fish Tentacles
Bees Nectar Sucking
Snail Grass Chewing
Ants Insects Scraping
Housefly Decaying Matter Brewing
Lice Blood Sucking
Butterfly Nectar Sucking

Thus, we can see that different organisms have different modes of nutrition.

Few organisms have a well-developed digestive system to digest their food. The lower organisms do not have proper digestive organs.

The food is broken down into smaller particles and transported to various parts of the body. The waste products are eliminated through the excretory organs in the body.

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NCERT Class-7-Science-Chapter-2-Nutrition in Animals-Solution

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