The air that enters the nasal cavity flows down the trachea. The trachea has a number of adaptations: cartilage rings in the walls of the trachea help to keep it open ciliated epithelium and ...

It is made up of rings of cartilage that form a tube-like structure. The cartilage helps to hold the trachea open and prevent it from collapsing. A collapsing trachea is a chronic medical ...

Bronchus The trachea splits into a left and right bronchus (plural: bronchi), each leads to a lung. Bronchiole Each bronchus splits again and again into thousands of smaller tubes called ...