1. EQ: What are the parts and functions of the MRS?

2. Male Reproductive System
 Functions to produce the male reproductive cell,
sperm
 Sperm production begins during puberty, usually
between 12-15 years old
 Pituitary gland secrets a hormone that causes testes to
begin producing testosterone; testosterone causes
testes to begin producing sperm

4. MRS Vocab
Penis Seminal Vesicle
Scrotum Prostate
Testes Cowper’s Gland
Epididymis Urethra
Vas Deferens

5. Penis  Male sex organ
 Used for sexual
reproduction and to
eliminate waste
 Sac that holds the testes
Scrotum  Controls temperature
*Seminiferous Tubules – long, threadlike tubes
inside testes where sperm is produced

6.  Male sex glands
Testes  Make testosterone – male sex
hormone
 Produce sperm –
 male reproductive cell
 Coiled structures on the
Epididymis backside of each testicle
 Sperm are matured and
stored

7. • 2 long tubes, connects w/
epididymis& urethra
Vas • Line with cilia to help move sperm
Deferens • Loops over pubic bone, around
bladder, through prostate, becomes
ejaculatory duct that opens into
urethra
Seminal •2 “fluid filled pouches”
•Secrete fluid that mixes w/ sperm
Vesicle •Makes sperm mobile
•Provides nourishment

8. • Located below the bladder
• Secretes milky, alkaline fluid
Prostate
• Major part of semen
• Protects sperm by neutralizing
acidity of urethra and vagina
• Opens into urethra
Cowper’s • Secretes clear, sticky fluid
to cleanse urethra to make
Gland safe passageway for sperm

9. • Passageway for sperm & urine
Urethra • Impossible to leave at the same
time!
• A mixture of sperm &
Semen fluids from seminal
vesicles, prostate, and
Cowper’s gland

10. Class Activity
Write a story about Winston’s life.
Winston is a sperm. Write about
his childhood all the way to
adulthood. Include where
Winston lives and how he travels.
Be creative!

12. Testicular Cancer Prostate Cancer
 Most common cancer in  Most common cancer in
men ages 15-34 men
 If caught early, can be treated  Symptoms include: frequent
properly & effectively urination; difficulty, pain or
 1st sign is a slight enlargement burning when urinating;
and change of consistency blood in urine, lingering pain
(i.e. lump) in testicle, or fluid in back, hips, or pelvis.
or blood in the scrotum  No early symptoms
 Only prevention is regular
examinations by a doctor

13. Nocturnal Emission
 During puberty, hormones cause the glands in the
reproductive system to begin producing fluids that
contain sperm
 The body relieves this pressure while the male is asleep
 The penis becomes erect and he will have an ejaculation
 May or may not be accompanied by a dream
 If a male has a dream dealing with sexual content, and has
a nocturnal emission, this is known as a “wet dream”

14. Sterility
 Male condition where the sperm a weak, malformed,
sparse or nonexistent, or unable to join an ovum (egg)
 Fertility does not take place
 Causes: temperature changes, exposure to certain
chemicals, smoking, getting mumps as a adult, an
untreated STD, a faulty operation of epididymis, vas
deferens, or urethra

15. Keeping the MRS Healthy
 Cleanliness of uncircumcised penis
 Smegma can get trapped under the foreskin (dead cells
and glandular secretions)
 Can cause irritation or infection if not cleaned regularly
 Testicular self-examinations
 Should be done monthly! The male rolls each testicle
gently between the thumb and fingers of both hands. If
there are any hard lumps, check with the doctor!