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Science · 2023 · 2 marks
CBSE 2023 · Region 5 · Set 2 · Q24
Write one important function each of the following in the human respiratory system: (a) Rings of Cartilage (b) Alveoli (c) Haemoglobin (d) Lining of…
Write one important function each of the following in the human respiratory system :
(a)
Rings of Cartilage
(b)
Alveoli
(c)
Haemoglobin
(d)
Lining of mucus
Marking-scheme solution
(a) (a) They ensure that the air passage does not collapse / trachea
(b) They provide a surface where exchange of gases take place.
(c) They transport oxygen to tissues .
(d)
Inhaled air is filtered.
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CBSE Class 10 Science past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.