- Cartilage, The cartilage plays a structural role keeping airways open, these line the trachea and bronchi in C-shape rings to allow for some movement and flexbility.
- Smooth muscle, Controls the flow of air by constrict the airways and making the lumen narrower.
- Elastic fibres, when the airway is constricted it cannot widen without help,so when constrict it deforms the elastic fibres which then recoil returning it to its original shape.
- Goblet cells, These produce mucus which can trap bacteria and other particles from the air.
- Ciliated epithelium, These waft the mucus to the back of the throat where it can be swallowed and whatever it contains destroyed.
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