The Reproductive System
Essential Question What is the purpose and function of the male and female reproductive system?
Reproduction Reproduction: Process by which living organisms produce new individuals of their kind. Reproductive System: Consists of a body organs and structures that make possible the production of offspring. Reproductive Cells: Guys: Sperm, produced in testes Girls: Ovum (eggs), produced in ovaries
Male Reproductive System Scrotum: contains testes & controls temperature. Testes: Produce sperm and make testosterone. Testosterone: Hormone that regulates sexual development.
Male Reproductive System Erection: penis becomes upright and firm Blood vessels of penis increases Semen: a mixture of fluids that protect sperm and carry them through the male reproductive system. Picture: Kidshealth.org
Male Reproductive System Ejaculation: a series of forceful muscular contractions. 300-500 million sperm released each time. There is a valve that blocks off the bladder. Nocturnal Emission (“wet dream”): Ejaculation during sleep.
Caring for Male Repro System Do a testicular self-examination every month. Bathe regularly Wear an athletic supporter when participating in contact sports Get regular check-ups Avoid wearing tight clothing Abstain from sexual activity (STD’s)
Caring for Male Repro System Testicular self-examination Choose a time when the scrotum is relaxed, usually after a shower or bath. Roll each testicle between thumb and fingers of both hands. Report unusual lumps to your doctor.
Female Reproductive System Ovaries: Holds eggs and releases one matured egg each month. You are born with all of your eggs. Switches sides each month. Also produce estrogen. Estrogen: Hormone that regulates sexual development.
Female Reproductive System OVULATION: the process by which the ovaries release mature eggs, usually one each menstrual cycle. Fallopian tubes: eggs travel from the ovaries to uterus (3-5 days). Eggs are fertilized here. Uterus: located in pelvis, in which the developing baby is nourished & protected.
Female Reproductive System Cervix: narrow part of the bottom of the uterus. This opening enlarges during labor to allow the baby to leave the uterus. Vagina: muscular passageway leading from the uterus to outside the body. Also where penis is during intercourse.
Female Reproductive System Labia: Folds of skin that cover & protect vagina. Females have 3 openings. Anus, vagina, urethra
Female Reproductive System Before ovulation, the lining of the uterus begins to build with blood, tissue & fluid. If fertilized, these tissues provide nutrients for baby during first two months of development. If not fertilized…. Menstruation: The flow from the body of blood, tissues & fluids that result from the breakdown of the lining of the uterus. Leaves through vagina Lasts about 5-7 days
Female Reproductive System Menstrual Cycle Occurs every 28 days: Phase 1:Days 1-5: menstrual discharge Phase 2: Days 6 -15: Uterine lining thickens, and ovulation occurs. Phase 3: Days 16 -28: Uterine lining continues to thicken, & the egg moves to the uterus. If egg is not fertilized, the lining of the uterus begins to break down, and a new menstrual cycle begins.
Caring for Female Repro System Do self breast examinations every month. Shower or bathe regularly Especially when menstruation is occurring. Schedule annual check-ups. Women: Keep a record of your menstrual cycle At age 21 (or earlier if sexually active): start getting a Pap test. Abstain from sexual activity to protect against STD’s
Caring for Female Repro System Self Breast Exam: should check once a month, usually about 1 week after menstrual period ends. Lie down put one arm over head and with the other hand perform breast exam. Move fingers in circular motion, over entire breast from underarm to sternum. Repeat with other breast. Stand up and look in a mirror with hands on hips. Look for: dimpling, rash, puckering, discharge, scales on nipples. Repeat with arms above head.