Male Reproduction
M.R.S. ANIMATION
Testosterone: Male sex hormone
~Testosterone causes the production of sperm.
Sperm: Male reproduction cell
~Two biological functions of the male
reproduction system:
1.Production of sperm
2. Transfer of sperm to the female body during
intercourse
• Ejaculation: Fluid from prostate, fluid from
seminal vesicles and 300-400 million sperm all
combine to make semen.
~During ejaculation, semen is propelled from penis.
• Semen: a thick fluid containing sperm and other
secretions from male reproduction organs.
• Fertilization: Is the union of a reproduction cell
from a male and one from a female.
• Circumcision: Surgical removal of the foreskin of
the penis.
• Foreskin-penis is covered w/ a fold of skin at
birth.
External Organs
Penis: Tube-like organ attached to the trunk of the body just
above testes.
~Functions: Sexual reproduction, sexual pleasure and elimination
of waste.
Testes: Oval organs, lie in the scrotum & secured @ either end
by the spermatic cord.
- Functions: Making testosterone & generating sperm.
Scrotum: Protects sperm by keeping the testes 3-4 degrees below
normal body temperature.
~If the temp. rises, the muscles of the scrotum relax, lowering the
testes.
~If the temp. drops, muscles contract, pulling testes closer to the
body.
Internal Organs
Epididymis: Stores newly produced sperm for about 64 days
until fully matured.
Vas Deferens :A pair of connecting tubes, each 18 inches long
that lead up into the males’ body toward other internal
organs.
~ Thick muscle walls of the Vas Deferens propel the sperm
forward.
Seminal Vesicles: Attached near the base of the bladder to
the Vas Deferens.
~The fluid contains nutrients and mixes w/ sperm.
Bladder: Muscular sac in the pelvis, just above & behind
public bone. Stores urine allowing urination to be infrequent
& voluntary.
Prostate Gland: Small gland that surrounds Urethra.
Cowpers Gland: Two pea –sized glands that open into
Urethra, secrete a clear sticky fluid to cleanse the
urethra of urine and left over sperm.
Urethra: Tube-like organ that travels through the penis,
carries sperm and urine.
~Semen and urine do not pass through the body at same
time.
~A muscle near the bladder contracts, preventing urine
from entering urethra.
MALE ANATOMY
Male Diagram

Male Concerns
Hernia: Part of the body pushes through the muscle wall normally
keeping it in.
(Example: Inguinal Hernia- part of the intestine pushes through
into scrotum. *Surgery is need to correct.)
Sterility: Sperm is weak, malformed, sparse or nonexistent.
Fertilization does not occur.
~Causes- Exposure to chemicals, smoking, STD’s, malfunction of
one of the internal organs.
Prostate Cancer: Uncontrolled growth of cells.
~Treatments- Removal of prostate or radiation therapy and hormonal
therapy.
Testicular Cancer: Signs- Enlargement of testicles, lump or fluid
collection, dull ache in the lower abdominal or groin area.
~Frequently males 15-35.
Preventing problems
1. Prevent STD’s
2. Prevent jock itch
3. Prevent Trauma (wear a sports cup)
4. Prevent hernias (caused by straining to push
or lift something, heavy coughing or
sneezing)
5. Prevent infertility