What type of epithelial lining is characteristic of the fallopian tubes?

A Simple cuboidal

B Stratified squamous

C Ciliated columnar

D Transitional epithelium

Solution

Correct Answer: Option C

The fallopian tubes, also known as the uterine tubes, are part of the female reproductive system responsible for transporting the ovum from the ovary to the uterus. The lining of the fallopian tubes plays a crucial role in facilitating this process.

The characteristic epithelial lining of the fallopian tubes is a ciliated columnar epithelium. This epithelium consists primarily of two main cell types:

1. Ciliated cells: These cells have hair-like projections called cilia on their apical surface. The beating of these cilia creates a current that helps move the ovum toward the uterus.
2. Non-ciliated secretory (peg) cells: These cells produce a nutritive fluid that supports the ovum and sperm, creating an optimal environment for fertilization.

Other options and why they are incorrect:
- Simple cuboidal epithelium (Option 1): Found in glands and some ducts but not typical of the fallopian tubes.
- Stratified squamous epithelium (Option 2): Present in areas subjected to friction like the vagina and ectocervix.
- Transitional epithelium (Option 4): Characteristic of the urinary tract, especially the bladder, to accommodate stretching.

Therefore, the fallopian tubes are lined by a specialized ciliated columnar epithelium, which is essential for the transport of the ovum and successful fertilization.

Reference:
Gray's Anatomy, 41st Edition, Volume 2, Chapter 24 – The Female Reproductive System / Page 1150

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