Q. 204.1( 47 Votes )
What is the
Trachea is an 11 cm long and hollow tube that opens into laryngopharynx through its opening called "glottis).
The inner wall of Trachea contains Mucus glands and cilia, this Mucus keeps the lumen of Trachea moist and cilia pushes the Mucus and dust away from lungs.
b) Trachea has" C-shaped" cartilaginous rings on its outer wall. These rings are 16-18 in number and prevent the collapsing of the Trachea when there is less air in it.
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