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This picture show part of human
penis, it is divided of many part correlate one each others. We found pictures
of penis anatomy from many website but We prefer simple picture to show you.
The penis of human is divide to three part of tissue
among other things: one corpus spongiosum located between corpora cavernosa on
the ventral side and two corpora cavernosa located in like above picture
precisely on the dorsal side.
The end of the corpus spongiosum is enlarged and bulbous-shaped and forms the
glans penis. The glans supports the foreskin or prepuce, a loose fold of skin
that in adults can retract to expose the glans. The area on the underside of the
penis, where the foreskin is attached, is called the frenum (or frenulum).
The urethra, which is the last part of the urinary tract, traverses the corpus
spongiosum and its opening, known as the meatus, lies on the tip of the glans
penis. It is a passage both for urine and for the ejaculation of semen. Sperm is
produced in the testes and stored in the attached epididymis. During
ejaculation, sperm are propelled up the vas deferens, two ducts that pass over
and behind the bladder. Fluids are added by the seminal vesicles and the vas
deferens turns into the ejaculatory ducts which join the urethra inside the
prostate gland. The prostate as well as the bulbourethral glands add further
secretions, and the semen is expelled through the penis.
The raphe is visible ridge between the lateral half of the penis, found on the
ventral or underside of the penis, running from the meatus (the opening of the
urethra) across the scrotum to the perineum (the area between the scrotum and
the anus).
The penis of man differs from those of most other mammals. There is no baculum,
or erectile bone; Rather than rely entirely on engorgement with blood to reach
the upright position. There can be withdrawn in groin, and is larger than
average in the animal kingdom in proportion to body mass. The penis is the male
reproductive organ.
The anatomy of
the penis is highly complex. It is basically
comprised of two cylinders of sponge-like
vascular tissue called Corpus Cavernosa that
fill with blood to create an erection. Blood is
pumped into the penis under pressure and a
series of valves keep it in the penis to
maintain the erection. A third cylinder is the
urethra, a tube that carries the urine and the
ejaculation fluid. Blood flows to the penis by
two very small arteries that come from the aorta
in the heart. The head of the penis is called
the Glans.
When the blood vessels become blocked and no
blood can get to the penis, impotence can occur.
Another major problem is leakage of blood from
the penis into the veins around the penis known
as a venous leak. This is a common problem which
requires more blood to be pumped into the penis
in order to keep it hard.
Vas Deferens:
The erectile tissue (Corpora Cavernosa & Corpus
Spongiosum) in the penis expands during sexual
stimulation. This can either be visual, tactile,
auditory, olfactory or imaginative. During
sexual stimulation the arteries supplying the
penis with blood dilate and large amounts of
blood rush into the erectile tissue. The blood
then becomes trapped causing the penis to stay
this way until ejaculation or until the male is
no longer stimulated.
Epididymus:
Epididymis is a structure which lies on and
around each testicle. It functions in the
transport, storage and maturation of sperm cells
originating from the testicle. When a man
complains of scrotal pain, acute or chronic
epididymitis is far and away that most common
diagnosis.
Acute epididymitis is usually more severe
involving more significant swelling and pain
than chronic epididymitis. Epididymitis which
lasts more than six weeks is considered chronic
epididymitis.
Testes:
Testes are a large number of tightly packed
coiled tubes. This is where sperm is produced.
Sperm production takes about two months, but
it's a continuous cycle. A typical male produces
several hundred million each day. This sperm
production process is called Spermatogenesis.
Sperm that is not ejaculated is then broken down
and reabsorbed by the body.
Testes also contain cells that secrete the male
sex hormone testosterone. Spermatozoa are among
the smallest and most highly specialized cells
in the body. All the genetic material that is
transmitted from a father to its baby is found
in each sperm head. The nucleus is covered by a
specialized enzyme coating that enable the sperm
to break down the covering of the egg and permit
entry should contact occur. Each sperm has a
mid-piece and an elongated tail that helps it
swim in its quest to fertilize the closest
female egg.
Scrotum:
The scrotum is a pouch-like sac that hangs on
the external part of the body cavity behind the
penis. This is where the testicles are
contained. This location provides the correct
temperature for the sperm to be produced
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