Download Male Reproduction System

Pre-Ejaculation
What’s the purpose of pre-ejaculatory
fluid?
 If contraceptives are not used, can a
woman become pregnant from preejaculatory fluid?
 If a man has a vasectomy, can they still
ejaculate? If so, what makes up the
ejaculate?
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Male Reproduction System
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Function – to produce a sperm cell
Male reproduction cell
 Sperm cell unites with a female egg (ovum) to form a
fertilized ovum
 Production starts at puberty (ages 12-15)
 Testosterone causes the testes to produce sperm
 Spermatogenesis – produce sperm for the rest of his
life
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External Male Reproduction Organs
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Testes – male sex glands, manufacture the male
sex hormone – testosterone and produce male
reproduction cell – sperm
Scrotum – sac that hold the testes.
Testes
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Seminiferous tubules – sperm is produced in this
section of the testes
500 million each day
Epididymis – stores newly produced sperm
64 days for sperm to fully mature
Penis
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Tubelike organ that functions in sexual
reproduction, sexual pleasure and elimination of
body wastes.
Erections – blood fills three cylinders which
surround the urethra
Ejaculation – release of reproduction fluids
Penis size varies from male to male
Circumcision
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Fold of skin that covers the end of the penis
(born with)
Surgical removal of the foreskin
Internal Male Reproductive Organs
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Vas Deferens – a long tube that connects the epididymis with the urethra
Seminal Vesicles – Two little pouches just above and either side of the
prostate gland, they secrete a fluid that mixes with sperm- the fluid travels
down the ejaculatory duct to mix with the sperm
Prostate Gland – below the bladder and surrounds the urethra, secretes a
milky and alkaline fluid that mixes with sperm (size of a chestnut)
Cowper’s Gland – glands that open into the urethra, secrete a clear and sticky
fluid that will cleanse the urethra of acid from urine
Urethra – tubelike organ that travels through the penis and leads to the
ejaculatory ducts, passage way for sperm and urine
Semen – mixture of fluids from the seminal vesicles, prostate gland and
Cowper’s gland
Concerns about the Male
Reproduction System
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Nocturnal Emissions
Hernia – pushing of a part of the body through
the muscle wall that normally contains it
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Inguinal hernia – weak spot in the abdominal wall
near the top of the scrotum. Part of the intestine
may push through
Concerns
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Sterility – weak or malfunctioning sperm
Temperature changes
 Certain chemicals
 Smoking
 Contracting mumps as an adult
 Untreated STD’s
 Faulty operation of epididymis, vas deferens, or
urethra
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Concerns
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Testicular Cancer
1% of all cancer
 15-34 years of age
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Concerns
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Prostate
Cancer
 Prostate gets bigger and blocks the urethra or
bladder
 2nd most common type of cancer in men
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