Question

Q3. Fill in the blanks:
1. The mucous membrane inside the makes the air entering it warm. (pharynx,
nose, mouth)
2. The air enters the_ through the trachea. (lungs, pancreas, liver)
3. There are alveoli at the end of the __(oesophagus, trachea)
4. The rate of breathing is 14 to 18 times a _ (second, minute, hour)
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Answer 1

Answer:

1) mouth

2) lungs

3) trachea

4) minute

Explanation:

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