NCERT Class VII Science Solutions: Chapter 2-Nutrition in Animals Part 6

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Question 28:

Result for Liver (Q)

Liver (Q)

Result for Liver (Q)

Label the following parts in Figure, and name them.

  1. The largest gland in our body.

  2. The organ where protein digestion starts.

  3. The organ that releases digestive juice into the small intestine.

  4. The organ where bile juice gets stored.

Answer:

Organs in digestive system

Organs in Digestive System

Organs in digestive system

  1. Liver

  2. Stomach

  3. Pancreas

  4. Gall bladder

Question 29:

Open your mouth, look into a mirror and try to count the different types of teeth in your mouth. Compare them with Figure, on page of your NCERT textbook. Record your observations in the table below:

Type of Teeth and Number of Teeth (Q)
Type of Teeth and Number of Teeth (Q)

Type of Teeth

Number of Teeth

In my mouth

In the figure

Incisors

Canines

Premolar

Molar

  1. Did you observe any difference in the number of teeth? If yes, could you identify which type of teeth showed the difference?

  2. Compare the number and type of teeth in an adult (say your parents or cousins who have reached the age of 25-30 or more). Note your observation.

Answer:

Children have 28 teeth in their mouth. There are only four molars in each jaw and not six. Adults have six molars in each jaw.

Type of Teeth and Number of Teeth (A)
Type of Teeth and Number of Teeth (A)

Type of Teeth

Number of Teeth

In my mouth

In the figure

Incisors

4

4

Canines

8

8

Premolar

8

8

Molar

8

12

Question 30:

Solve the crossword given as Figure.

Result for crossword puzzle (Q)

Crossword Puzzle (Q)

Result for crossword puzzle (Q)

Across

1. Cream-coloured digestive gland.

4. Organ that mixes saliva with the food.

5. Point of defecation.

7. Stored in gall bladder.

10. Finger-like outgrowth in the small intestine.

13. Kind of taste buds.

14. Kills bacteria in the stomach.

Down

2. Feeds with the help of pseudopodia.

3. Undigested excretory solid residues.

6. Total number of molars in one jaw of an adult.

8. Largest gland.

9. Watery secretion in the mouth.

11. A ruminant.

12. Form of food chewed by ruminants.

Answer:

Result for crossword puzzle

Crossword Puzzle

Result for crossword puzzle

Across

1. Cream-coloured digestive gland - Pancreas

4. Organ that mixes saliva with the food - Tongue

5. Point of defecation - Anus

7. Stored in gall bladder - Bile

10. Finger-like outgrowth in the small intestine - Villus

13. Kind of taste buds - Sour

14. Kills bacteria in the stomach - Acid

Down

2. Feeds with the help of pseudopodia - Amoeba

3. Undigested excretory solid residues - Faeces

6. Total number of molars in one jaw of an adult - Six

8. Largest gland - Liver

9. Watery secretion in the mouth - Saliva

11. A ruminant - Cow

12. Form of food chewed by ruminants – Cud