A) bronchial tree
B) atrium
C) bronchi
D) alveoli.
Correct Answer: C
Solution :
: m human respiratory system, the larynx leads into a long tube called trachea, bearing rings of hyaline cartilage which are incomplete posteriorly and prevent its collapse during respiration. At its lower end, the trachea bifurcates into a pair of primary bronchi which enter the left and right lungs.
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