Male Reproductive
System
Male Reproductive Systems: For Discussion: True or False?
1. Sperm cells in the female reproductive tract are considered by a
woman’s immune system to be “non-self” and are attacked by her
True
white blood cells.
2. Sperm cells are considered by a man’s immune system as “non-self”
and are attacked by a man’s own white blood cells. True
3. A woman, in her reproductive lifetime, has the potential to produce
about 500,000 eggs, but she will only ever use about 500. True
4. The average man, in a single average ejaculation of semen, emits
more reproductive cells than the average woman produces in her
reproductive lifetime. True, about 420 million per average ejaculate,
he produces about 4 million/hour
5. Only one sperm may fertilize an egg in humans. True
6. Only about 1 in 42,000 sperm, or 0.00238 % of the sperm in an
average ejaculation reach the egg. True
MALE REPRODUCTUVE
CELL
• SPERM
The Male
Reproductive System
Urinary
bladder
Penis
Vas
deferens
Urethra
Testes
Seminal
vesicle
Ejaculatory
duct
Prostate gland
Cowper’s
gland
Epididymus
Scrotum
Testicles
• Produce Sperm
– Millions released during
ejaculation
– Life span is less then 72
hours
• Produce Testosterone
(Male Hormone)
– Creates secondary sex
characteristics
• Hair
• Lower voice
• Larger muscles
• Must maintain a certain
temperature
- Maintains
temperature
Scrotum
Epididymis
- Stores
sperm until
matured and
needed for
ejaculation
Vas Deferens
-Pathway of
sperm and
semen during
ejaculation
•Penis
–Male sex organ
–Delivers semen out of the body
–urination
•Erection
–Sexual arousal
–Increased blood flow to tissue
–Elongates and makes more rigid
The Penis
Figure 28.11
The Male Reproductive System in
Anterior View
Figure 28.3
• Found in the
penis
• Tube that
carries urine
from bladder
• Tube used in
ejaculation
Urethra
Accessory
glands
• Cowpers Gland
– secrete a lubricating fluid
• (pre-cum)
• Prostate Gland
• Seminal Vesicle
-Secrete a
sugary fluid
(fructose)
that
provides
energy to
the sperm
Seminal
Vesicle
Prostate Gland
-Secrete a
chemical
fluid that
helps sperm
live longer
The Male Reproductive System
Figure 28.1
Quiz
1. Where is sperm stored until needed
for ejaculation?
2. What controls the temperature of
testicles?
3. What is the name of the male sex
cell?
4. What part of the male reproductive
system release testosterone?
5. Name one gland that adds fluid to
sperm to make semen.
Quiz- Answers
1. Where is sperm stored until needed for
ejaculation? Epididymis
2. What controls the temperature of
testicles?
Scrotum
3. What is the name of the male sex cell?
Sperm
4. What part of the male reproductive
system release testosterone? Testes
5. Name one gland that adds fluid to sperm
to make semen. Prostate, or Cowper’s or
Seminal Vesicles
• Virtual diagram of the male reproductive
system