NCERT Class VII Science Solutions: Chapter 2-Nutrition in Animals Part 3

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NCERT Class 7 Science Chapter 2: Nutrition in Animals

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Question 11:

Match the items of Column I with suitable items in Column II

Match the Column I and Column II (Question)
Match the column I and column II (Question)

Column I

Column II

  1. Salivary gland

  • Bile juice secretion

  • Stomach

  • Storage of undigested food

  • Liver

  • Saliva secretion

  • Rectum

  • Acid release

  • Small intestine

  • Digestion is completed

  • Large intestine

  • Absorption of water

  1. Release of faces

Answer:

Match the Column I and Column II (Ans)
Match the column I and column II (Ans)

Column I

Column II

  1. Salivary gland

3. Saliva secretion

  1. Stomach

4. Acid release

  1. Liver

1. Bile juice secretion

  1. Rectum

7. Release of faces

  1. Small intestine

5. Digestion is completed

  1. Large intestine

6. Absorption of water

2. Storage of undigested food

Question 12:

Label Fig of the digestive system.

This figure shows digestive system

Figure of Digestive System

Answer:

As showing in images is a small and large intestine

Small and Large Intestine

Question 13:

Can we survive only on raw, leafy vegetables/grass? Discuss.

Answer:

Raw leafy vegetables and grass are rich in cellulose, a type of carbohydrate. Many animals, including humans, cannot digest cellulose, because they do not have enzymes and certain type of bacteria which can digest cellulose. We cannot survive by taking vegetables in raw form. That's why we boil or cook vegetables which breaks down cellulose into simple carbohydrates. We can only survive by taking in vegetables in boiled/cooked form.

This image shows leafy vegetables/grass

Leafy Vegetables/Grass

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