Carefully study the diagram of the human respiratory system with labels A, B, C and D.
Select the option which gives correct identification and main function and /or
characteristic.
A. P - Nostril/ nasal cavity: ensures that the air-passage does not collapse
B. Q - Rings of cartilage: have fine hair to filter the passing air
C. R - Diaphragm : it flattens when we breathe in
D. S - Ribs: they are lifted when we breathe out .
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Answer:
A- In front, the nostrils, or nares, create openings to the outside world.
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Carefully study the diagram of the human respiratory system with labels A, B, C and D.
Select the option which gives correct identification and main function and /or
characteristic.
A. P - Nostril/ nasal cavity: ensures that the air-passage does not collapse
B. Q - Rings of cartilage: have fine hair to filter the passing air
C. R - Diaphragm : it flattens when we breathe in
D. S - Ribs: they are lifted when we breathe out .
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