why do the walls of the trachea collapse when there is less air in it
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due to pressure difference beteen atmosphere and inside
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Explanation:
The trachea is covered by incomplete C- shaped cartilaginous rings . ... The back part of each ring is made of muscle and connective tissue. This ring prevents trachea from collapsing when there is less air in it. The trachea is composed of rings of tough cartilage.
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