Question

11 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 for characteristic (1) Broschus Culcud of rib () (iv) A. (i) Trachea: It is supported by bony rings for conducting inspired air. B. (i) Ribs: When we breathe out, ribs are lifted C. (ii) Alveoli: Thin-walled sac like structures for exchange of gases. D. (iv) Diaphragm: It is pulled up when we breathe in​

Answer 1

Image is missing

answer is C

Answer 2

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 for characteristic is C. (ii) Alveoli: Thin-walled sac like structures for exchange of gases.

Explanation:

• Trachea: The trachea serves as passage for air ,moistens and warms while it passes  into the lungs and protects the respiratory surface from an accumulation of foreign particles.
• Ribs: Ribs are the bony frame work of the thoracic cavity.
• Alveoli: The alveoli provide the surface where the exchange of gases can takes place.
• Diaphragm: Diaphragm is dome shaped muscle that contracts rhythmically and continually and most of the involuntary.