Question

19. In respiratory system of
man the trachea is prevented
from collapsing by *​

Answer 1

Answer:

Deoxygenated air from the lungs passes back up through the trachea during exhalation. The cartilaginous rings support the tube of the trachea and prevent it from over-expanding or from collapsing, like when you suck on a straw too hard.

Answer 2

Answer:

The cartilaginous rings

Explanation:

The cartilaginous rings support the tube of the trachea and prevent it from collapsing.

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