Epithelial lining of Oviducts

The oviducts or fallopian tubes are a pair of tubular structures that transport egg cells from the ovaries to the uterus in females. The inner lining of the oviducts is made up of epithelial cells, which are specialized cells that cover the inner and outer surfaces of organs and tissues throughout the body.

Ciliated Columnar Epithelium

The correct answer is option D, which is ciliated columnar epithelium. This type of epithelium is characterized by the presence of hair-like projections called cilia on the apical surface of the cells. The cilia are responsible for creating a current that moves the egg cell along the oviduct towards the uterus.

Functions of Ciliated Columnar Epithelium

1. Movement of egg cells: The cilia on the surface of the epithelial cells create a sweeping motion that moves the egg cell along the oviduct towards the uterus.

2. Secretion of nutrients: The epithelial cells secrete nutrients such as glycogen and proteins that nourish the egg cell as it moves through the oviduct.

3. Protection against infection: The mucus-secreting cells in the epithelium help to trap and eliminate bacteria and other pathogens that may enter the oviduct.

Conclusion

In summary, the oviducts are lined by ciliated columnar epithelium, which plays a crucial role in the transport of egg cells from the ovaries to the uterus. The cilia on the surface of the epithelial cells create a current that moves the egg cell along the oviduct, while the secretion of nutrients and protection against infection help to support the survival and health of the egg cell.

Cells of the oviducts are usually columnar in shape but bear numerous cilia at their free surfaces. The ciliated cells serve to move the ovum away from the ovary and towards the uterus.