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Oogenesis occurs here Ovary Consists of seminiferous tubules for the production of sperm and interstitial cells which produce male sex hormones. Testes During ejaculation, these two glands secrete mucus, fructose, and prostaglandins (stimulate uterine contractions that help sperm move into the urethra) Seminal vesicles This gland secretes a milky alkaline fluid into the urethra, to neutralize acids in the urethra Prostate gland These two glands secrete a small amount of fluid to lubricate the urethra prior to ejaculation. Furthermore, they secrete clear mucus that neutralizes any acidic urine remaining in the urethra. Bulbourethral glands Fertilization occurs here Oviduct From first to last, the structures a sperm will pass through to exit male's body Testi-Epididymus-Vas Deferens-(seminal vesicle+prostate gland add fluids)-Urethra FSH Made by pituitary gland, stimulates follicle to begin ovulation, stimulates release of estrogen; present in highest amounts during follicular phase of ovarian cycle. Promotes activity of Sertoli cells during Spermatogenesis LH Made by the pituitary gland, causes Leydig cells to secrete testosterone and other androgens, triggers ovulation; present in highest amounts during follicular phase of ovarian cycle. Estradiol (Estrogen) Made only in follicle of ovary, stimulates development of endometrium, levels will decline if ovum is not fertilized; present in highest amounts during follicular phase of ovarian cycle. Estrogen Stimulates development of endometrium Progesterone Made in ovary, levels will decline if ovum is not fertilized; present in highest amounts during luteal phase of ovarian cycle. Maintains FSH levels, low levels=corpus luteum gone=Menstruation GnRH Secreted by hypothalamus, directs the anterior pituitary to secrete LH and FSH Negative-Feedback mechanisms 1.Testes regulate blood levels of GnRH/FSH/LH via inhibitory effects on the Hypothalamus and Anterior Pituitary 2. Inhibin, produced by Sertoli cells, acts on the anterior pituitary gland to reduce FSH secretion Oxytocin Begins labor via positive feedback