Question

Which of the following help majorly in the movement of the ovum towards the uterus?

I. Ciliated simple columnar cells
II. Peg cells
III. Muscularis of oviduct
IV. Serosa of oviduct

• A. I and II only
• B. I, II and III
• C. I, III and IV
• D. I and III only

Answer 1

The correct option is D I and III only

Ovum is the female gamete which is formed in primary sex organ or the ovary. The release of a mature ovum from the ovary is called ovulation.

The ovum is captured by the fimbriae or the finger-like extensions present on the oviduct. The oviduct is a long tube-like structure that connects the ovaries to the hystera (uterus). It has 3 layers- mucosa, muscularis and serosa.

The mucosa consists of epithelium and lamina propria. The epithelium consists of-
i. Ciliated simple columnar cells help in the mobility of the oocyte.
ii. Non-ciliated cells known as peg cells which secrete fluid for the nourishment of the ovum.

The muscularis consists of smooth muscles. The peristaltic movements of this layer along with the ciliary movement of the mucosa help move the oocyte towards the uterus.

The serosa forms the outer layer of the uterine tubes. It helps in partitioning the oviduct from the abdominal cavity.