Biology
Which of the following tissues is found in the lining of the trachea ?
- Ciliated epithelium
- Cuboidal epithelium
- Columnar epithelium
- Squamous epithelium
Answer
Ciliated epithelium
Reason — In the lining of the trachea, the columnar epithelium has developed cilia. Such an epithelium is called ciliated epithelium. Cuboidal epithelium is found in organs like the kidneys and glands, where it helps in secretion and absorption, not in the trachea. Simple columnar epithelium is found in the intestine for absorption. In the trachea, it is specifically ciliated columnar epithelium, so this option is incomplete. Squamous epithelium is a thin, flat layer of cells found in areas like the alveoli of lungs for diffusion. It is not found in the trachea lining.
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