Answer:
18 Answer: Hypothalamus, Pituitary and Gonads (Testis and Ovary)
19 Answer:
GnRH (Gonadotropin Releasing Hormone) secreted by hypothalamus
LH (Leutinising Hormone) and FSH (Follicle Stimulating Hormone) secreted by Pituitary Gland
Estrogen (released by ovary) and Testosterone (released by Testis)
Step-by-step explanation:
GnRh stimulates pituitary gland to release LH and FSH
LH or leutinising hormone facilitates maturity of gonads (testis and ovaries) and production of gametes.
FSH stimulates ovulation and has deep influence no menstrual cycle in female.