Give reasons:
1.Fine hair and mucus are present in the nasal passage.
2.Rings of cartilage are present in the throat.
Please refer the link:
https://www.meritnation.com/ask-answer/question/hair-and-moucous-are-present-in-our-nasal-cavity-why/respiration-in-organisms/8191879
Rings of cartilage are present in the throat to ensure that the air passage does not collapse.
https://www.meritnation.com/ask-answer/question/hair-and-moucous-are-present-in-our-nasal-cavity-why/respiration-in-organisms/8191879
Rings of cartilage are present in the throat to ensure that the air passage does not collapse.