Answers

2015-06-10T11:42:13+05:30
The trachea does not collapse when there is less air in the atmosphere because we has c shaped rings in the neck.

// you can feel those with ur hand

Fact- to kill anyone just put pressure on these trachea
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2015-06-10T11:42:51+05:30

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The walls of trachea are supported by cartilaginous rings which ensure that the trachea doesn't collapse in between breaths when there is less air inside it.
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