trachea
c-rings make sure the () stays open, made of hyaline cartilage
The trachea is a tube-like structure located in the neck and chest that connects the larynx (voice box) to the bronchi of the lungs. It is commonly referred to as the windpipe and serves a vital role in respiratory functions, allowing air to flow in and out of the lungs.
The trachea is composed of hyaline cartilage rings that provide structure and support to the tube. The rings are C-shaped, with a small gap on the posterior aspect, allowing for expansion of the trachea during swallowing. The trachea is lined with a mucous membrane and cilia, which helps to filter and humidify the air while trapping foreign particles such as dust and bacteria that can cause infections.
The trachea also has a crucial role in protecting the airway. The cough reflex, for example, is triggered when the trachea senses something like mucus or irritants, and sends a signal to the brain, prompting a cough to clear the airway.
In summary, the trachea plays an essential role in breathing by transmitting the air from the larynx to the lungs, keeping the airway clear and filtering and humidifying the air.
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