Question about the fetal pig?

Question

This question is referring to the fetal pig...The trachea carries air directly to the lungs. The trachea is made up of cartilage with a “ring” shape all the way down. Hypothesize how this ring-like structure helps the function of carrying air to the lungs.

Answer 1

It won't collapse under pressure if, say, the pig swallows some food, or bends its neck.

Rings keep the airway open. That's all there is to it.

Answer 2

Pretend to be Hindu, and maybe they'll let you dissect a fetal dog instead.

Answer 3

Come on, do your own homework.