Reproduction and the early years of life

1. Reproduction and the Early years
of life
Standard #8
Individual Growth and Development

2. Male reproductive System

3. The BasicsThe Basics
• Glans – the tip (head) of
the penis; made up of
nerve endings that make it
extremely sensitive
• Shaft – the rest of the
penis
• Circumcision – removal of
the foreskin; often done
for religious/cultural
reasons

4. What is the Sperm
(spermatazoa)?
• Male reproductive cell; contains one half of
the instructions needed for the development
of a human being. Produced in the
seminiferous tubules of the testes
• Takes 2 to 10 days to fully mature

5. What is Fertilization?
• The union (joining) of a sperm and an egg

6. What are Testis (2) (testicle-1)?
• Egg shaped structures (2) that hangs inside
of the scrotum which have seminiferous
tubules

7. What are the Functions of testis?
• 1. Make sperm (50,000 a minute)
• 2. Produce male sex hormone testosterone

8. What is the Epididymis?
Sperm are stored in the large coiled tubules on
the outer surface of the testis. Sperm mature
here (get their tails)

9. What is the Scrotum?
• The sac in which the testis hang; protects
the testes

10. What are the Vas Deferens?
• Pathway for sperm. Joins with the urethra.

11. What is the Seminal vesicle?
• Produces thick fructose secretions that
nourish the sperm and help them move
easier; located at base of bladder

12. What is the Prostate gland?
• Secretes a thin, milky alkaline fluid;
protects the sperm from acid in female
reproductive system; encircles the urethra
near the bladder

13. What is the bulbourethral (Cowper’s)
gland?
• Prior to ejaculation it Secretes clear fluid that
protects sperm from acid in male urethra (cleans
the urethra); found near the urethra below the
prostate gland

14. What is the Urethra?
• (inside the penis) final exit for sperm
(semen) and urine

15. What is the Penis?
• Male reproductive structure that deposits
sperm (semen) inside the female body

16. What is an Erection?
• Occurs when the male becomes sexually
excited; the arteries leading to the penis
open wider, allowing more blood to flow to
the penis causing the penis to become
larger, longer and firmer

17. What is Ejaculation?
• Process in which the sperm leaves the male body
 semen (combination of seminal fluid, sperm,
prostate fluid, Cowper's fluid)
• Pre-ejaculatory fluid  pre-cum
• One ejaculation contains 40 million  400
million sperm ** only the strong survive**
• Only one sperm can fertilize the egg, except in
rare twin cases

18. Problem of the Male Reproductive
System
Problem What is it ? Symptoms Treatment
Jock itch Fungal infection
of groin area
Itchy rash in
groin
Keeping area
cool and dry
Cystitis Inflammation of
the urinary
bladder
Burning during
urination
Antibiotics
prescribed by a
doctor
Prostatitis Bacterial
infection of the
prostate
Fever, pain in
the pelvis
Antibiotics
prescribed by a
doctor
Inguinal hernia Bulging of
portion of the
intestines or
other
Abnormal bulge
in the abdomen
Immediate
medical care

19. Keeping the Male Reproductive System Healthy
• Male should watch for any changes or symptoms
that might indicate a problem
• If any symptoms or problems are present, see the
doctor right away
• Wear appropriate protective gear when playing
contact sports
• Avoid wearing tight clothing
• Wash the penis and scrotum every day
• If you are not circumcised, wash underneath the
foreskin
• Perform a monthly testicular self-exam
• Have an annual checkup with a doctor

20. Testicular Self-Exam
• Perform the self-exam during or after a
warm bath or shower
• Stand in front of the mirror, and hold the
penis out of the way
• Examine each testicle separately
• Look and feel for any lumps or any change
in the size, shape, or consistency of the
testicle
• Contact your doctor if you detect any
troublesome signs

22. penisscrotum
testes
epididymis
Vas
deferens
Seminal vesicle
Prostate gland
Cowper’s
gland
urethra