Question

Give reasons:

a) Trachea do not collapse after exhalation of gases.

b) Aquatic organisms have a faster breathing rate in comparison to terrestrial organisms.

c) Smoking is injurious to health.​

Answer 1

Answer:

The trachea is supported by c-shaped rings of cartilage which hold them in place when there is less air inside it. Due to this, the walls of trachea do not collapse even when there is a little air. So, the correct option is 'cartilaginous rings'.