The trachea is composed of about 20 rings of tough cartilage. The back part of each ring is made of muscle and connective tissue. Moist, smooth tissue called mucosa lines the inside of the trachea. The trachea widens and lengthens slightly with each breath in, returning to its resting size with each breath out.
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They expand and as they do so air rushes into to them.
they are then full of air!
In the airways of the lungs, cells have waving hair-like structures called cilia. They sweep dirt and germs out of the airways
Choking Agents
respiratory
It can cause a buildup of phlegm and mucus in the airways, but not in the lungs.
larger airways in the lungs
airways and lungs
Trachea
Cigarettes, over time, hurt the lungs and constrict the airways to the lungs, therefore, air has to push through the airways, making a breathless feeling to the smoker
A lot.
true
Smooth muscle
Transpulmonary pressure