Question 1

Which cell is released during ovulation?

Accepted Answer

Ovulation releases a secondary oocyte from the Graafian follicle, not a mature ovum. The secondary oocyte completes meiosis II only after sperm entry in the oviduct.

Question 2

What are the three layers of the uterine wall?

Accepted Answer

From outside to inside, the uterine wall has the perimetrium, a thick muscular myometrium and an inner endometrium. The myometrium supports uterine contractions, while the endometrium changes during the menstrual cycle.

Question 3

How do the oviducts collect the released secondary oocyte?

Accepted Answer

Each oviduct ends near an ovary in a funnel-shaped infundibulum bearing finger-like fimbriae. The fimbriae help collect the released cell and direct it into the oviduct; the ovary is not directly joined to the tube.

Question 4

What happens to the corpus luteum if pregnancy does not occur?

Accepted Answer

The corpus luteum degenerates into the corpus albicans. With the decline of estrogen and progesterone, the prepared endometrium is shed, and menstrual flow begins on Day 1 of the next cycle.

Question 5

How do the main hormones regulate the menstrual cycle?

Accepted Answer

FSH promotes follicular growth, while estrogen from the developing follicle promotes endometrial growth. The LH surge triggers ovulation, and progesterone from the corpus luteum maintains and prepares the endometrium during the luteal phase.

Female Reproductive System 3D — Ovary, Oviduct, Uterus & Menstrual Cycle

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