Question

select the option which gives correct function or characteristic of the four part of human respiratory system.
A. alveoli: thin-walled sac like structures for exchange of gases.
B. Diagram: it is pulled up when we breathe in.
C.Trachea: it is supported by Bony rings for conducting inspired air.
D. Ribs: When we breathe out, ribs are lifted.​

Answer 1

Answer:

A

Explanation:

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Answer 2

Correct answer of the above question is- Alveoli are the thin walled sac like structures that help in exchange of gases.

• The diaphragm is a dome-shaped organ of our respiratory system which helps in inhale and exhale of air. When we inhale the air, the diaphragm flattens.

• Trachea is supported by the cartilaginous rings and helps in the conduction of air to and out of the lungs.

• Ribs help in the protection of thoracic organs. Ribs also help in respiration. When we breathe in, ribs are lifted while they get depressed when we breathe out.