Transcript Atomic Dog Publishing, Inc.

Chapter Four
Male Anatomy, Physiology,
and Sexual Response
Copyright Atomic Dog Publishing, 2004
Male External Anatomy
and Physiology - 1
• Male Reproductive Anatomy, Side View
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Male External Anatomy
and Physiology - 2
• Penis
The primary male external sex organ, which, in the
unaroused state, is soft and hangs between the
legs.
• Scrotum
The sac located below the penis that contains the
testicles.
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Circumcision
• Circumcision is surgical removal of the foreskin.
• The procedure is a religious or cultural rite in some
societies.
• Funding the procedure is controversial in some areas.
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Male Internal Anatomy
and Physiology - 1
• Male Internal Reproductive System, Posterior
View
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Male Internal Anatomy
and Physiology - 2
• Cross-Section of Testicle
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Male Internal Anatomy
and Physiology - 3
• Testes
Male gonads that develop from the same embryonic tissue as
the the ovaries and produce spermatozoa and male hormones
(Also called testicles)
• Personal Choices: Timing of Testicular Self-Exam
Testicular cancer is the most common form of cancer in young
men. The key is early diagnosis and treatment.
• Duct System
 Seminiferous tubules
 Epididymis
 Vas deferens
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Male Internal Anatomy
and Physiology - 4
• Seminal Vesicles
Secrete fluids that mix with sperm to become semen
• Prostate Gland
Produces much of the seminal fluid
• Personal Choices: Timing of Prostate Rectal Exam
The most common type of nonskin cancer in U.S.
men is prostate cancer.
More than 80% of all prostate cancers are diagnosed
in men over the age of 65.
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Sexual Response Cycle in Men
Masters and Johnson’s Four-Stage Model of Sexual
Response
•
•
•
•
Excitement: Physiological changes including an
erection.
Plateau: Additional physiological changes including
testicular enlargement and a “sex flush.”
Orgasm: Release of tension including emission and
expulsion of semen.
Resolution: Physiological responses return to normal
and the testes and scrotum shrink.
Copyright Atomic Dog Publishing, 2004