Final answer:
FSH and LH, which play key roles in the reproductive system, are secreted by the anterior pituitary gland in response to GnRH from the hypothalamus.
Step-by-step explanation:
The anatomic structures that secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH) are part of the endocrine system, specifically the anterior pituitary gland. The anterior pituitary gland produces these hormones in response to signals from the hypothalamus, which releases gonadotropin-releasing hormone (GnRH). FSH and LH play crucial roles in the reproductive system; FSH stimulates the maturation of sperm in males and the growth of ovarian follicles in females, while LH stimulates the production of testosterone in males and triggers ovulation as well as the production of estrogen and progesterone in females.