1. Human
Reproduction

2. Sexual Reproduction
testis
ovary
eggs (ova)
sperm
fertilization
zygote
embryo
fetus
baby

3. Male Reproductive System
vas deferens (sperm duct)
epididymis
testis

4. Testes
For production of male sperm (500 mill per day) For production of male sex hormones (testosterone) Suspended behind and below penis Puberty – 2 months to mature Genetic material in head of sperm

5. Holds testes Regulates temperature below normal Secretes hormones
Scrotum
Holds testes Regulates temperature below normal Secretes hormones

6. Epididymis
For temporarily storage of sperm For temporary nourishment of sperm Gain ability to move Takes a while

7. Testis and epididymis
epididymis
vas deferens (sperm duct)
Seminiferous tubules

8. Seminiferous Tubules
Each one contains thousands of feet of tiny tubes, lined with cells that continually produce sperm

9. Male Reproduction
seminal vesicle
semen
prostate gland
Cowper’s gland

10. Functions of Seminal Fluid
To provide a medium for the sperm to swim To activate and nourish the sperm To neutralize the acidity in the female reproductive tract
Seminal
Fluid
Semen
Sperm +

11. Semen
Seminal Vesicle – 60% energy Prostate Gland – 35% protects it through the Fallopian tube Cowper’s Gland – 5 % discharges a liquid that cleans the urethra so sperm can pass through safely

12. Male Urinary Tract
urethra
penis

13. Penis Muscles of epididymis contract Erected during copulation
Semen is squeezed from the penis to the top of vagina
Ejaculation (1/2 teaspoon sperm-400 mill.)
No ejaculation-sperm reabsorbed
Foreskin - Circumcision

14. Urethra and Bladder
Urethra – eliminates urine and passageway for semen Bladder - stores urine

15. What is this?

16. Female Reproductive System
Fallopian Tube
ovary
uterus
cervix
vagina

17. Functions of Ovary
Pair-size of small plum For production of female sex hormones (estrogen & progesterone) Produce eggs (birth, app. 500,000) Alternate release at puberty

18. Human Ovaries with Eggs

19. The release of an egg from an ovary
Ovulation
The release of an egg from an ovary

20. Fallopian Tubes
1. Carries the egg forward by the beating action of the cilia on its inner surface 2. The contraction of muscles of tube 3. Fertilization must take place here within 24 hours 4. Takes app. 3 days to travel down

21. Fallopian Tubes

22. Uterus
Also called the womb (size of a fist) Fertilized egg grows into a baby Made of powerful elastic muscles that contain many blood vessels Lining expelled during menstruation

23. Cervix
Opening to uterus Strong and elastic Usually not much larger than the head of a pin Needs to be covered for birth control Stretches to accommodate a baby at the time of birth

24. Vagina
Passageway Menstrual flow leaves Allows penis to enter Enables baby to leave Called Birth Canal

26. Hymen
Tissue surrounds the inside of the vaginal opening and is there at birth

28. Vulva and Clitoris
Labia – inner and outer Clitoris – small, rounded, sensitive above the vaginal opening

29. Urethra – eliminates urine Bladder – stores urine
Urethra and Bladder
Urethra – eliminates urine Bladder – stores urine

30. PUBERTY PUBERTY MP
Female Younger than male and lasts about 7 years Ovaries produce estrogen Hair Breasts Hips get wider Egg cells begin to mature

31. Male Lasts up to 9 years and begins older than female Testosterone
Hair
Genitals get larger
Shoulders get broader and muscles bigger
Adam’s apple grows larger
Voice
Reproductive system begins

32. Menstrual Cycle Once in about 28 days (2-7 days, varies)
Discharge of blood and cells from the lining of the uterus (endometrium)
Menstruation WMV 1.35
Physical discomfort
First menstruation is called Menarche
Continue until Menopause (45-55)
Lisa Koch 3.02
Discomforts
Male Menopause is called Andropause

34. Jeopardy (1) reproductive system.ppt
REVIEW
Jeopardy (1) reproductive system.ppt