The Four Layers Of The Respiratory System

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The respiratory system is made up of two different parts, the upper respiratory tract which includes the nose, mouth and the beginning on the trachea. This is the part that is in charge of taking in the air and letting it back out again, and then the lower respiratory tract which is made up of the trachea and the lungs.

There are four different layers that make up the trachea, these include the mucosa which is the in most layer. This consists of ciliated pseudostratified columnar epithelium tissue which contains goblet cells that secrete a tacky mucus that lines the walls of the inner trachea so that it catches any debris breathed in via the air before it hits the lungs.

Ciliated pseudostratified columnar epithelial cells are a rectangular
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