During the ovarian cycle, the structure responsible for the production of progesterone is the:
a. secondary oocyte
b. corpus luteum
c. anterior pituitary
d. vestibular glands
e. corpus albicans

Corpus luteum

Explanation:

During the whole ovarian cycle that lasts for 28 days. it is divided into phrases:

Follicle phase: It is also called as follicle cohort and the mature follicle is selected during this time. This phase ends resulting into ovulation.

The main hormone that is produced during this phase is estradiol. This phase lasts for 14 days but can vary in different individuals.

Luteal phase: Progestron is the main hormone produced during this phase. This is produced by the corpus luteum. It also lasts for 14 days.

the ileocecal valve (also called bauhin valve), which limits the rate of food passage into the cecum and may prevent material from returning to the small intestine.