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The trachea is lined with:
Simple squamous epithelium
Stratified squamous epithelium
Simple columnar epithelium
Pseudostratified ciliated columnar epithelium
Answers (1)
The trachea is lined with pseudostratified ciliated columnar epithelium, a type of tissue that appears stratified but is actually a single layer of columnar cells. This epithelium serves important functions in the respiratory system. The cilia on the surface of the cells beat in a coordinated manner, propelling mucus and trapped particles upwards toward the throat. This process, known as the mucociliary escalator, helps remove germs and debris from the airways. Goblet cells in the epithelium secrete mucus, which traps inhaled particles and prevents them from reaching the lungs. The combination of cilia and mucus effectively cleans the respiratory tract, maintaining its health.
Hence, the correct answer is option 4.
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