Where is simple columnar ciliated epithelium located?

• A. Lining of stomach
• B. Lining of uterus and uterine tube
• C. Lining of small intestine
• D. Lining of gall bladder

Answer: (B)

Ciliated simple columnar epithelium has a single layer of tall cells with motile cilia on the apical surface. Those cilia beat to move substances along the surface. In the female reproductive tract, the uterine tubes are lined with this tissue, and the cilia help sweep the ovum toward the uterus. The stomach and gallbladder lining are simple columnar but non-ciliated and specialized for secretion or absorption, with mucus-secreting cells or microvilli rather than cilia. The small intestine is also simple columnar for absorption, with microvilli, not cilia. So, the location that features simple columnar ciliated epithelium is the lining of the uterus and uterine tube.