Question:
Trachea is internally lined by:
Trachea is internally lined by:
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Pseudostratified ciliated columnar epithelium with goblet cells is called respiratory epithelium and lines most conducting air passages.
Updated On: Jun 12, 2026
- Pseudostratified ciliated epithelium
- Columnar ciliated epithelium
- Stratified cuboidal ciliated epithelium
- Keratinised ciliated epithelium
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The Correct Option is A
Solution and Explanation
Concept:
The respiratory tract is lined with specialized epithelial tissue that protects the airways from dust particles, microorganisms and other foreign substances.
The trachea possesses respiratory epithelium adapted for cleaning and humidifying inspired air.
Step 1: Identify the lining of trachea. The inner surface of the trachea is lined by pseudostratified ciliated columnar epithelium containing goblet cells.
Step 2: Function of cilia and goblet cells. Goblet cells secrete mucus. Dust particles and microbes become trapped in mucus. Cilia continuously beat upward and move the mucus toward the pharynx where it can be expelled or swallowed.
Step 3: Importance of this arrangement. This mechanism forms the mucociliary escalator which protects the lungs from harmful particles.
Step 4: Final conclusion. The trachea is lined by: \[ \boxed{\text{Pseudostratified ciliated epithelium}} \] Hence option (A) is correct.
Step 1: Identify the lining of trachea. The inner surface of the trachea is lined by pseudostratified ciliated columnar epithelium containing goblet cells.
Step 2: Function of cilia and goblet cells. Goblet cells secrete mucus. Dust particles and microbes become trapped in mucus. Cilia continuously beat upward and move the mucus toward the pharynx where it can be expelled or swallowed.
Step 3: Importance of this arrangement. This mechanism forms the mucociliary escalator which protects the lungs from harmful particles.
Step 4: Final conclusion. The trachea is lined by: \[ \boxed{\text{Pseudostratified ciliated epithelium}} \] Hence option (A) is correct.
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