CLASS - 4 || SUBJECT - SCIENCE || LESSON - 3|| HUMAN BODY: DIGESTIVE SYSTEM AND EXCRETARY SYSTEM ||

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LESSON - 3

HUMAN BODY: DIGESTIVE SYSTEM AND EXCRETARY SYSTEM

 

1.     What is digestion? Name the organs of the digestive system.

The process by which food is broken down into a simpler form so that it can be easily taken in or absorbed by our body is called digestion. Stomach, small and large intestines, liver, rectum and anus are the main organs of the digestive system.

 

2.    What happens to the food in the small intestine?

The food passes into the small intestine and the digestion is completed in the small intestine and the useful nutrients from the food are absorbed into blood.

 

3.    Write the functions of any two organs of the excretory system.

The excretory system is made up of a pair of kidneys, a pair of ureters, a uninary bladder and urethra.

Kidneys:- Urines is formed inside the kidneys. They filter and absorb the waste from blood and release it form of urine.

Ureters:- urine is transported form the kidneys to the urinary bladder through thin tubes called ureters.

 

4.   Why is drinking water essential for our digestive system?

Without sufficient water absorption of food and nutrients in the intestine will not be proper. Water helps in the removal of solid wastes from our body.

 

5.    List five healthy eating habits which lead to good digestion.

a.    Wash hands properly both before and after eating food

b.   Do not drink a lot of water while eating.

c.    Eat food rich in fibre like oats, beans and banana.

d.   We should chew the food properly.

e.   We should be regular about the meal timings.

 

6.   Draw a well labelled diagram of the digestive system.

 


 

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