what is function trachea why do it's wall not collax even when there is less in it
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Answers
Answer:The main function of the trachea is to provide air flow to and from the lungs.
Explanation:
The trachea is a tube about 10 cm long and 20 mm in diameter.
It starts at the larynx and runs to just below the sternum, where it divides into the left and right bronchi of the lungs.
Functions of the trachea
1. Air conduction
The primary function of the trachea is to provide air passage to your lungs for respiration, i.e. to inhale air rich in oxygen and exhale carbon dioxide.
2. Protection
The lining of the trachea has a sticky mucous lining that traps foreign substances.
These trapped substances are expelled upwards and can either be excreted from the body as phlegm or swallowed in the esophagus.
If a foreign object accidentally gets into the trachea, the ciliary cells get irritated and induce coughing to expel the object.
3. Thermoregulation
When the air is cold, the trachea helps to humidify and warm the air entering the lungs.
When the air is hot, heat is carried away in exhaled air through evaporation of water.
Trachea never collapse because it is made up of cartilaginous rings which prevent it from collapsing. Trachea is supported by C-Shaped rings of cartilage which Hold them in place when there is less air inside it. So, the walls of the trachea doesn't collapse when it has sufficient air