Sketch an oocyte and the cumulus oophorus in a mature follicle and label all the structures.

Clincial note: Menopause results when the supply of ovarian follicles is exhausted at about age 50. With loss of the steroid hormones secreted by the follicles, cyclic growth and loss of the uterine endometrium stops and a variety of somatic and emotional problems can occur.

On the same slide, identify atretic follicles which stopped developing at various stages (Fig. 22-9).

What is the significance of follicular atresia?

Identify the corpus luteum on slide 13 and the very large corpus luteum on slide 58 (Fig. 22-10). Within the corpus luteum on slide 58, identify the masses of granulosa lutein cells, separated partially by septa, and surrounded by a thinner layer of less prominent theca lutein cells (Fig. 22-10).

Based on their histological appearance, what do these cells secrete? What is their function?

Examine slide 61 and identify a corpus albicans (Fig. 22-11). This ovary specimen from an older individual contains few follicles, but several corpora albicans.

What does the corpus albicans represent and why do these structures persist much longer in mothers?

Now for the oviducts.