Nutrition in Animals Class 7 Worksheet Science Chapter 2

Q.1. True/False

(i) Digestion of starch starts in the stomach.

False

(ii) The tongue helps in mixing food with saliva.

True

(iii) The gall bladder temporarily stores bile.

True

(iv) The ruminants bring back swallowed grass into their mouth and chew it for some time. 

True

(v) We chew the food with the teeth and break it down mechanically into small pieces. 

True

(vi) Large intestine receives digested and absorbed food. 

False

Q.2. Fill in the blanks.
(i) The main steps of nutrition in humans are ____, ____, ____, ____ and ____.

ingestion, digestion, absorption, assimilation and egestion.

(ii) The largest gland in the human body is ____.

liver

(iii) The stomach releases hydrochloric acid and ____ juices which act on food.

digestive

(iv) The inner wall of the small intestine has many finger-like outgrowths called ____.

villi

(v) Amoeba digests its food in the food ____.

vacuole

(vi) We chew the food with the ____ and break it down mechanically into small pieces.

teeth

Q.3. Where are fats digested in the body?

Fats are mainly digested in the small intestine.

Q.4. What kills bacteria that enter along with the juices to act?

The acid kills many bacteria that enter along with the juices to act.

Q.5. Where are faeces formed in the human body?

Faeces are formed in the human body in large intestine.

Q.6. Where food is absorbed in our body?

Absorption of food takes place in small intestine.

Q.7. Where faeces are stored?

Faeces are stored in rectum.

Q.8. Name the end products of fats.

Fatty acids and Glycerol

Q.9. What is ingestion?

The process of taking food into the body is called ingestion.

Q.10. What does saliva do to food in our mouth?

The saliva breaks down the starch into sugars.

Q.11. What is rumen?

Ruminants have a large sac-like structure called rumen.

Q.12. What are permanent teeth?

The second set that replaces a temporary milk teeth are the permanent teeth.

Q.13. What does animal nutrition include?

Animal nutrition includes nutrient requirement, mode of intake of food and its utilisation in the body.

Q.14. What are the different modes of feeding in animals?

Scraping, chewing, brewing, capturing and swallowing, sucking etc. are the different mode of feeding in animals.

Q.15. What is diarrhoea?

Sometime we may have experienced the need to pass watery stool frequently. This condition is known as diarrhoea.

Q.16. What do you mean by assimilation?

The absorbed substances are transported via the blood vessels to different organs of the body where they are used to build complex substances such as the proteins required by the body. This is called assimilation.

Q.17. What are ruminant animals?

The grazing animals like cows, buffaloes and deer are known as ruminants.

Q.18. What do pancreatic juices digest?

The pancreatic juice acts on carbohydrates, fats and proteins and changes them into simpler forms.

Q.19. What is cud?

Cud is partly digested food returned from stomach (called rumen) of ruminants to the mouth for further chewing.

Q.20. What do you mean by rumination?

A process in which partially digested food returns to the mouth in small lumps and the animal chews it is called rumination.