What are the functions of the tissues in the lung cells?
Cartilage
- supports the trachea and bronchi by holding them open
- prevents collapse when air pressure is low in inspiration
- not a complete ring so there is some flexability so you can move your neck without restricting airways and so oesophagus can expand during swallowing
Smooth Muscle - can contract to restrict the airway to stop harmful substances entering alveoli
Elastic Fibres - when smooth muscle contracts the elastic fibres recoil to the original size to dilate the airways
Goblet cells and gladular tissue - secrete mucus to trap particles
Ciliated epithilium - tiny hair like structures move to waft the muucus up the airway to the back of the throat
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