(1) Trachea

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6 Terms

1
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Trachea

The windpipe; a passage through which air moves in the respiratory system.

<p>The windpipe; a passage through which air moves in the respiratory system.</p>
2
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Features of Trachea

- C shaped rings of cartilage

- Elastic Fibres

- Smooth Muscle

- Ciliated epithelium

3
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C-shaped rings of cartilage in Trachea

- Provides strength and support for the trachea and bronchi, keeping them open

- Prevents collapse during inhalation. As the chest volume increases, there will be a lower pressure in the trachea

- The rings are c-shaped so that food can move easily down the oesophagus behind the trachea

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Elastic Fibres in Trachea

Elastic fibres recoil to their original shape, expel air, and prevent the lungs from bursting.

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Smooth Muscle in Trachea

Contracts and relaxes airways

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Goblet cells & ciliated epithelium in Trachea

- Goblet cells secrete mucus which traps dust/bacteria that enters the lungs

- The cilia then waft the mucus to the top of the trachea / back of the mouth, where it is swallowed or coughed up