What is the role of the diaphragm in breathing? Class 7
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What is the role of the diaphragm in breathing? Class 7
Question 1.
What is the role of the diaphragm in breathing? Class 7
(i) To filter the air
(ii) To produce sound
(iii) To help in inhalation and exhalation
(iv) To absorb oxygen
Answer:
(iii) To help in inhalation and exhalation.
Match the following:
| Name of the part | Functions |
| (i) Nostrils | (a) fresh air from outside enters |
| (ii) Nasal passages | (b) exchange of gases occurs |
| (iii) Windpipe | (c) protects lungs |
| (iv) Alveoli | (d) tiny hair and mucus help to trap dust and dirt from the air we breathe |
| (v) Ribcage | (e) air reaches our lungs through this part |
Answer:
| Name of the part | Functions |
| (i) Nostrils | (a) fresh air from outside enters |
| (ii) Nasal passages | (d) tiny hair and mucus help to trap dust and dirt from the air we breathe |
| (iii) Windpipe | (e) air reaches our lungs through this part |
| (iv) Alveoli | (b) exchange of gases occurs |
| (v) Ribcage | (c) protects lungs |