Basic facts of human sexual anatomy and reproduction

Basic facts of human sexual anatomy and reproduction
* This is only a preliminary and incomplete set of cartoons, with English text. As funding becomes
available, we plan to develop additional cartoons to cover the remaining topics in human reproduction
and sexual health.
* It is not necessary to present all the cartoons during your educational sessions. You are free to pick
and choose and add to your collection from other sources.
* Sahaya International encourages others to use and adapt these cartoons to meet your local needs, e.g. for
slide presentations, in printed materials (such as pamphlets, brochures), provided the materials that
have been reproduced are distributed free or at cost (not for profit), and that Sahaya International
is acknowledged as a source of these cartoons. We appreciate receiving a copy of any materials in
which some of these cartoons have been used. If you like to use the original cartoons (without the
English text), then please contact us.
* Any organization or person who wishes to copy or reproduce these cartoons of human reproduction
for commercial purposes (with profit) must first obtain permission from Sahaya International.
* Cartoons drawn by Portrait Advertising (www.portraitindia.com) with intellectual input, addition of
text and layout by Sahaya International volunteers.
Sahaya International
c/o Koen Van Rompay
2949 Portage Bay Avenue, Apt. 195
Davis, CA 95616
USA
e-mail: kkvanrompay@ucdavis.edu
www.sahaya.org

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PENIS
SCROTUM
FORESKIN
GLANS

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MALE EXTERNAL GENITALS
(UNCIRCUMCISED & CIRCUMCISED)
• The PENIS is the male sex organ
• The SCROTUM is the bag that holds the TESTICLES.
• The penis is normally covered by foreskin. In some cultures, the foreskin is
removed, sometimes at birth, sometimes at older age. This removal of fore-
skin is called CIRCUMCISION.
• A circumcised penis always shows the glans of the penis.
• In an uncircumcised penis, the GLANS (the head of the penis) becomes only
visible when the foreskin is pulled back.
• When a boy reaches puberty, pubic hair starts growing around this area,
which some men shave off.

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URINARY
BLADDER
PROSTATE
SPERM
TUBE
SEMINAL
PENIS
VESICLES
EPIDIDYMIS
TESTICLE

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MALE INTERNAL GENITALS
• The two TESTICLES make the SPERM. The sperm cells are microscopic cells with
tails that try to join the egg of a woman and make her pregnant. A healthy testicle
produces many millions of sperm cells each day. The testicles also produce the male
hormone, TESTOSTERONE. When a boy matures into a man, these male hormones
are responsible for many body changes (such as the growth of a beard/moustache, the
changing of the voice).
• The 2 testicles are in a bag, called SCROTUM. The reason for this is because the testicles function best at a temperature that is a few
degrees lower than the temperature inside of the body.
• The sperm cells go from the testicle to the EPIDIDYMIS for storage and further maturation. Without sex or masturbation, the sperm
cells will eventually die and be resorbed. During sex with a partner or during masturbation, the sperm goes to the SPERM TUBE
(“Vas deferens”). Each testicle has a sperm tube. Along the sperm tubes there are several glands, such as the PROSTATE and the
SEMINAL VESICLES, which secrete the liquid (SEMEN) that carries the sperm.
• The URINE BLADDER is a bag that stores the urine. As it fills, it stretches and gets bigger.
• The last part of the tube is called the URINE TUBE (“URETHRA”). It is used to carry the sperm, but also the urine out through the
penis.

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ERECTION
• In rest, the penis is small and flacid. When a man becomes sexually aroused
(for example during sex or during masturbation), the penis has cavities that
fill up with blood, so the penis becomes enlarged and hard. This is called
ERECTION.
• At the climax of arousal (the ORGASM), the semen fluid with the sperm
cells will flow from the testicle through the tube and out of the penis. This is
called EJACULATION.
• After the ejaculation, the penis becomes small and flacid again.

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ERECTION
• In rest, the penis is small and flacid. When a man becomes sexually aroused
(for example during sex or during masturbation), the penis has cavities that
fill up with blood, so the penis becomes enlarged and hard. This is called
ERECTION.
• At the climax of arousal (the ORGASM), the semen fluid with the sperm
cells will flow from the testicle through the tube and out of the penis. This is
called EJACULATION.
• After the ejaculation, the penis becomes small and flacid again.

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CLITORIS
OUTER LIPS
URETHRA
INNER LIPS
OPENING OF VAGINA
ANUS

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