Which of the following organ(s) has ciliated epithelium?
Trachea
Oesophagus
Small intestine
Iris
A
Trachea
B
Small intestine
C
Oesophagus
D
Iris
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Solution
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In humans, the trachea is lined by pseudostratified ciliated mucous epithelium. The mucus keeps the tracheal surface moist. The cilia sweep the bacteria and dust particles and protect the respiratory tract from infection.
Thus the correct answer is option A.
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