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Funct
ion o
f th
e M
ale
Repro
duct
ive S
yste
m
To produce sperm cells (male
reproductive cells) Begin producing sperm
around 12-15 yrs old Puberty - development and
maturation of the reproductive system Hair develops (pubic region,
underarm, arms, legs, chest,
face) widening of the shoulders
and chest, deepening of the
voice, skin oiler, acne develops,
increased perspiration, body
odor, growth spurt, Adam’s
Apple protrudes, testicles drop
External
1. Testes or Testicles – male
sex glandsa. Functions (1) to manufacture the male sex
hormone testosterone (2)
Produce reproductive cells
sperm which is produced in the seminiferous tubules Can produce (roughly) up
to 100 million sperm in
one dayThis number slightly
deceases with age
2.Scrotum – the sac that
hangs outside of the body
that holds the testesa. Function –(1) regulates
body temperature and (2)
protection of the testes
As body temperature
increases – the scrotum will
hang lowerAs body temperature
decreases – the scrotum will
contract towards the body
Will draw up close to the body
during arousal
3.Epididymis a. Function - where sperm
cells are stored for 64
days until mature So what does this mean?
The sperm cells that are in
your semen “tonight” were
produced 2 months ago
b. Location – top to the
back of each testicle
Coiled structure – when
uncoiled it will stretch to 20
feet in length
4.Penis – the male sexual reproductive organa. Functions (1) reproduction (2) pleasure (3) elimination of wastes; urine and semenb. 2 States
1. Erect – hard state Also known as an errection Caused by an increases blood flow to the penis The spongy tissues in the penis fill with blood making it
longer, larger, and harder Often followed by an ejaculation – release of semen from
the penis 1 ejaculation = about 1 teaspoon of fluid 200-500 million sperm cells in 1 ejaculation Semen can be released during the soft state pre
ejaculation
2. Flaccid – soft state Also known as the resting state
Glans – tip or head of the penis Most sensitive **
Shaft – the base or length of the penis
Foreskin – excess skin at the glans of the penis
Shaft
Internal
1.Vas Deferens – long tube that connects the epididymis with the urethra Function – passageway
and connecter a. Lined with cilia to
move sperm along 18 inches long if
extended
2.Seminal Vesicles – fluid
filled pouches Location – found on both
sides of the prostate Function – (1) fluid helps
make the sperm mobile
and (2) provides nourishment to sperm
cells Sugary fructose substance;
source of energy to make
the cells * is a component of semen
3.Prostate Gland Location – lies below
the bladder and surrounds the urethra
About the size of a chestnut Function – secretes a
milky, alkaline fluid that mixes with sperm
* is a component of semen
4.Cowper’s Gland Location – directly
below the prostate About pea sized
Function – secretes a
clear, sticky fluid to allow a safe passageway for sperm
* is a component of semen
5.Urethra – tube that travels through the center of the penis that is a passageway
for semen and urine
(not at the same time)
6.Urinary Bladder – holding area for urine
So w
hat
make
s up s
em
en?
Fluids from:1. Seminal Vesicles2. Prostate Gland
3. Cowper’s GlandAnd the most important
component: 4. Sperm Cells Contains 23 chromosomes
Com
plic
ati
ons
&
Occ
urr
ence
s
1. Sterility – the inability to
reproduceSperm is weak, malformed,
sparse, non-existent, unable to
join with an ovum
Caused by: a birth defect,
exposure to extreme
temperatures, exposure to
chemicals, exposure to high
amounts of radiation, smoking,
STIs, vasectomy, and injury
Vasectomy – permanent procedure
of sterilization, sealing the vas
deferens so sperm cells cannot join
with the fluids to make semen.
Incisions made into testicles
In office procedure
Cost effective
2.Testicular Cancer Signs – swelling, small hard
lumps, possible pain in the
testicle region Affects males usually
around the ages of 15-34
yrs Unknown causes – linked to
exposure to chemicals, HIV
+, genetics Responsible for 12% of
Cancer deathsWhite males 5x more likely
to get then any other race
4.Prostate Cancer Signs – pain in the lower
abdomen and frequent
urination Detection – Rectal exam
Affects males 50+ yrs
No known cause – linked to
hereditary, male genetic
flaws, diet high in animal
fat Targets African American
Men 2nd leading cause of death
of men