The walls of the trachea are surrounded by C-shaped rings of cartilage. What is the purpose of this cartilage? A)
Cartilage adjusts the diameter of the trachea.
B)
Cartilage helps to warm and humidify the air of the trachea.
Cartilage prevent foreign objects from entering the respiratory passages.
D)
Cartilage prevents the collapse or overexpansion of the trachea as
pressure changes in the respiratory passages,