1. Male Reproductive System

2. What the Male Reproductive System Does
Main function is to produce sperm and deliver it to the female reproductive system

3. How the Male Reproductive System Works

4. Male Puberty Starts at around age 12-13
Hormonal changes stimulate an increase in growth rate, alterations in behavior, enlargement of the genitals, and the appearance of secondary sexual characteristics such as facial hair.
Because boys begin their final growth spurt later than girls, they have a longer period of steady growth and usually attain a greater adult height.

5. Male Puberty Changes that occur: Growth spurt occurs
Acne may appear
Larynx enlarges, voice deepens
Facial hair appears
Shoulders broaden
Underarm hair appears
Perspiration increases
Some breast enlargement may occur
Muscles develop
Pubic hair appears
External genitals enlarge
Sperm production begins
First ejaculation occurs
Long bone growth stops

6. Sperm
Sex cells that are produced in the testes and are used to fertilize the egg
Sperm swim at the rate of 1-4mm per minute or mm per hour
50,000 sperm are produced each MINUTE in mature men

7. Testicles (testes)
Male reproductive organ that makes sperm and testerone
Male begin producing 100+ million sperm a day once they reach puberty

8. Seminiferous Tubules
Tightly coiled tubes inside the testes where sperm are made

9. Testosterone The male sex hormone that influences sperm production
During puberty, testosterone causes facial and body hair to grow, shoulders to broaden and voice to deepen

10. Scrotum The skin covered sac that the testes rest in
Muscles of the scrotum help with temperature control
Sperm develop best several degrees below 98.6

11. Penis
The external male reproductive organ that is made up of spongy tissue that has blood flow going through it
The penis removes urine from the bladder and also delivers sperm to the female reproductive system
The glans is the sensitive nerve ending near the tip of the penis

12. Foreskin
A piece of skin that partially covers the tip of the penis at birth
Circumcision is the removal of the foreskin from the tip of the penis

13. Erection When the penis becomes hard and firm
The blood vessels in the penis fill with blood
The penis must be erect in order for ejaculation to occur

14. Ejaculation When sperm are released from the penis
One ejaculation contains million sperm
It is normal for a male to ejaculate during sleep, this is called nocturnal emissions or “wet dreams”

15. Urethra
Urine passes through the urethra, a tube that starts at the bladder and ends at the opening of the penis
Sperm also pass through the urethra during ejaculation but not at the same time as urine is carried

16. Epididymis
A tightly coiled tube where sperm mature as they pass through
The epididymis can be up to 700 feet long

17. Vas Deferens The next portion of a hollow tube that sperm pass through
The vas deferens can be up to 12 inches long

18. Vasectomy The severing and tying off of the vas deferens
Once the vas deferens is severed, sperm will not be able to be ejaculated out of the penis

19. Seminal Vesicles Found near the base of the urinary bladder
Produce thick secretions that nourish the sperm and help sperm move easier

20. Prostate Gland Encircles the urethra near the bladder
About the size of a walnut
Secretes a thin, milky fluid that protects the sperm from acid in the female reproductive system

21. Cowper’s Gland Found near urethra below the prostate
Prior to ejaculation this gland secretes a clear fluid that protects the sperm from acid in the male urethra

22. Bladder
A triangular sac that stores urine before it is excreted out of the body

23. Sphincter Valve
A small piece of skin, a muscle that holds back urine or semen so that both do not come out of the body at the same time

24. Prostate Exam
An examination that is performed to identify any irregularities in the prostate
Exams help in early detection of prostate cancer
Prostate cancer occurs primarily in older males and is the 2nd most common cancer in males in the U.S
For every 3 men diagnosed with cancer this year 1 will have prostate cancer.

25. Testicular Exam
A self exam that men should perform once per month once they have reached puberty to detect any lumps, swelling, pain, or discomfort in the scrotum or abdomen

26. Path of Sperm Testes Epydidimis Vas deferens Prostate Gland
Seminal Vesicle
Sphincter Valve
Urethra
Ejaculated out of Body

27. Path of Sperm 5 4 7 3 2 1 8