1. The Reproductive System

2. Essential Question
What is the purpose and function of the male and female reproductive system?

3. 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

4. Male Reproductive System
Scrotum: contains testes & controls temperature.
Testes: Produce sperm and make testosterone.
Testosterone: Hormone that regulates sexual development.

5. 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

6. Male Reproductive System
Ejaculation: a series of forceful muscular contractions.
million sperm released each time.
There is a valve that blocks off the bladder.
Nocturnal Emission (“wet dream”): Ejaculation during sleep.

7. 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)

8. 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.

9. 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.

10. 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.

11. 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.

12. Female Reproductive System
Labia: Folds of skin that cover & protect vagina.
Females have 3 openings.
Anus, vagina, urethra

13. 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

14. 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 : 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.

15. 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

16. 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.