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Reproductive System Male Reproductive System 1. Testis: sperm produced within seminiferous tubules The testis are kept at ideal temperature for sperm development within the scrotum. 2. Epididymis: storage site where sperm mature 3. Move into a tube, vas deferens, before entering the urethra. Female Reproductive System Eggs released by the ovary travel through the fluid-filled fallopian tubes by microscopic cilia to the muscular uterus. The lining of the uterus is prepared to receive a fertilized egg. The Menstrual Cycle Ovulation: Follicular Menstruation: Phase: Luteal Phase: If the egg isreacts not to low Hypothalamus Cells of the follicle High levelsthe of corpus estrogen fertilized, estrogen levels, causing the transform into the corpus causes the pituitary gland luteum disintegrates anterior pituitary to release which to luteum release large releases amounts and estrogen & FSH & and LH estrogen of FSH & levels LH progesterone progesterone fall triggering menstruation Follicles begin to develop Follicle ruptures, cellsisaround eggit will If the–egg fertilized, releasing the egg produce estrogen which implant in the uterine wall and causes the lining of the release HCG which maintains uterus to thicken the corpus luteum. Menstrual Cycle – Example of Feedback Regulation High levels of estrogen cause an increase in secretion of FSH & LH: positive feedback (#4) Progesterone results in the inhibition of FSH & LH secretion: negative feedback (#8) Diseases of the Reproductive System • Can be caused by a variety of pathogens including bacteria, viruses, protists and fungi. • Example of Bacterial disease: Chlamydia (Chlamydia trachomosis Chlamydia facts: Most common STD Men – no symptoms Women – can lead to infertility due to scarring of fallopian tubes Cervical cells infected with Chlamydia Diseases of the Reproductive System • Example of a viral reproductive disease: Human papillomavirus (HPV) HPV Facts: Over 100 types of this wartcausing virus Over 30 are linked with cervical cancer According to the CDC, over 50% of men & women will have HPV at some time in their lives Cervical cells infected with HPV