The ciliated columnar epithelial cells in humans are known to occur in:
Correct answer: B. The bronchioles and Fallopian tube
- A. The Eustachian tube and stomach lining
- B. The bronchioles and Fallopian tube
- C. The bile duct and oesophagus
- D. The Fallopian tubes and urethra
Explanation
The ciliated columnar epithelial cells in humans are present in the nasal passages, oviducts (Fallopian tubes) terminal bronchioles, ventricles of the brain and central canal of the spinal cord of the embryo. The columnar ciliated epithelium consists of columnar cells which bear cilia on the free surface.
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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