Peniology - The structure and the function of the penis -- NICE AND WET

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Date Posted: 19:41:53 04/01/14 Tue
Author: Knut Holt
Subject: Peniology - The structure and the function of the penis

The Structure and Function of the Penis

The visible penis consists of two sections - the penis head or glans penis and the penile shaft. However, the penis continues as a hidden structure laying under the scrotum and reaching further backward in the perineal area towards the prostate. When the penis is erect, also the perineum, the area between the legs will be swollen.

The urinary tube (urethra) goes from the bladder, then through the prostate, then enters this penile structure just beneath the prostate and then goes forward all the way to the tip of the penis.

THE ERECTILE BODIES

In the visible penis and in the structure extending backwards there are three bodies that swell during erection, erectile bodies. The bodies are mostly made of a tight mesh of fine blood vessels with very elastic walls. There are two bodies along the upper part of the penis (corpora cavernosa) that extend backwards under the scrotum. Then there is one body around the urethra (corpus spongiosum) that continues backwards to just under the prostate.

The arteries leading blood to the erectile bodies and the veins leading blood from these bodies have muscles in their walls that can close off or relax to regulate the blood flow to and from these bodies.

When the muscles at the entrance relax and those at the outlet constrict, blood is filled into the mesh by the blood pressure. The erectile bodies will then engorge as a balloon and get straight. The swelling and straightening of the erectile bodies will inflate the whole penis and make it erect. This activity is regulated by nerve impulses and the substance nitrogen oxide working as a local tissue hormone.

All the inner structures of the penis are surrounded by a robust sheet of elastic connective tissue, the fibrous envelope. In the area between the legs there is a sheet of muscles between the fibrous envelope and the perineal skin, the two bolbospongiosus muscles. These muscles contract during ejaculation and help to pump out the semen.

THE PENILE SKIN

The penile skin is thick and robust. Between the skin and the fibrous envelope, there is a thin area consisting of a soft and extremely elastic connective tissue. Therefore the skin can easily be moved up and down along the penile shaft.

The penis head is covered by a thin skin which is extremely sensitive by means of a rich innervation. Still this thin skin is both strong and elastic. In addition the skin in an uncircumcised penis is covered by a hood that is not stuck to the surface of the head after early infancy, the foreskin.

The foreskin is a continuation of the skin covering the shaft that goes to the tip of the penis and is then folded back inwards, making a double layer, where the inner fold is fastened just under the penis head. Between the two folds there are an extremely soft and elastic tissue.

The foreskin can easily be retracted to show the bare penis head, and it uses to retract itself when the penis is erect. When the penis is not erect, the foreskin protects the penis head.

In early infancy the foreskin is fixed to the penis head, but will gradually loosen, usually during early infancy, but in a preteen boy there can still be some adhesions left around the base of the head.

In some cultures it is custom to remove the foreskin for various reasons by an operation called circumcision., making the penis head permanently exposed and visible. When circumcision is done in early infancy, the procedure also involves tearing the fixed foreskin loose from the surface of the head.

The skin of the penis head produces a white creamy substance called smegma which helps to lubricate the penis during intercourse. Smegma is a blending of oils secreted through the skin on the glans, cells loosened from the skin surface and substances produced by sebaceous glands on the inside of the foreskin. With improper hygiene too much smegma can accumulate and give excessive bacterial growth and bad smell.

THE INNERVATION AND BLOOD SUPPLY OF THE PENIS

The main nerves controlling the penile function and bringing sensual stimuli from the penis are the dorsal penile nerves, situated on both sides in the connective tissue of the upper side of the penis and branching out to all parts of the penis. Erection is controlled by sensual stimuli going to the spinal cord and control impulses coming back, both through this nerve. Ejaculation is controlled by other nerves going to the muscle sheet in the perineum and to all other structures involved in bringing the semen out.

The main blood supply of the penis comes from the dorsal penile arteries going in the connective tissue at the upper side of the penis and branching off to all parts of the penile skin and inner penile structures.

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Knut Holt is an internet marketer and author with a focus on health items and eroticism. TO FIND health information, items to improve erotic life and natural drugs, PLEASE VISIT:

http://www.abicana.com

Products against: Sexual problems, UTI, yeast infection, over-weight, cold, flu, allergies, acne, edema, hypothyroidism, depression, hemorrhoids, heart and circulatory problems, digestive ailments, rheumatism and more.

Article Source: http://EzineArticles.com/?expert=Knut_Holt

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About Erection

Erection takes place when structures inside the penis and along the urethra between a man's legs are filled with blood and inflated. This occur upon signals from the brain and the spinal cord, and the signals are transmitted through nerves in the parasympatic nervous system, a part of the autonomous or involuntary nervous system.

HOW THE NERVOUS SYSTEM TRIGGERS AND CONTROLS THE ERECTION

The erection is triggered and controlled by the following events:

- Something stimulates sensorial bodies in the genital zone or other senses. Impulses are then sent from the senses through nerves and the spinal cord towards the brain, and reaches the upper areas of the brain. The brain then recognizes these impulses as something sexually arousing. Also thoughts originating in the brain itself may be recognized as something sexually arousing.

- The higher brain areas having recognized some arousing events then send impulses down to the limbic system at the lower area of the brain. It is the limbic system that actually produces the feeling of excitement.

- The limbic system sends signals down the spinal cord and out to the genital area through nerves called nervi erigentes - a part of the parasympatic nervous system

- The signals reaching the penis and the rest of the genital zone then trigger erection and engorgement of the area between the man's legs.

- Stimuli to the penile or genital sensorial bodies do not need to reach the brain to result in an erection. Areas in the spinal cord will also recognize the stimuli and get excited. Then the spinal cord also by its own sends erectile impulses back to the genital area.

- The sensorial bodies in the genital area will also be stimulated mechanically by the erection. Since stimulation of these bodies trigger erection, the erection process is self enforcing. A beginning erection thus trigger even more erection.

THE ANATOMICAL BASE FOR ERECTION

In the penis lie three bodies consisting of a network of very elastic blood vessels having circular smooth muscles in their walls, called erectile bodies. There are two paired bodies lying at the upper side of the urethra (corpora cavernosa), and one lying around the urethra (corpus spongiosum).

The muscles in the vessel walls are able to constrict the volume of the vessels, or relax allowing the vessels to widen. Vessels leading blood to or from the erectile bodies also have the ability to constrict or relax in order to restrict or facilitate blood flow. The erectile chambers are not only confined to the penis, but continue in the area between the legs all the way backwards to the anal area.

WHAT HAPPENS IN THE GENITAL ZONE DURING AN ERECTION

The erection response consists of the following events in the genital zone:

- When the signals from the brain and the spinal cord reach the nerve ends in the penis and the genital zone, the chemical compound nitric oxide (NO) is released.

- Nitric oxide then spreads through the genital area and especially the penis. Nitric oxide then triggers the following reactions.

- Blood vessels leading blood to the erectile bodies relax. Then more blood flows into the penis.

- Blood vessels leading from the erectile bodies constrict, making it difficult for blood to leave the bodies.

- The smooth muscles around the vessels in the erectile bodies relax, allowing these vessels to widen.

- The blood going into the erectile bodies will then fill up in the vessels of the bodies and inflate the bodies to a much larger volume.

- The inflated bodies will get straight and hard. The growing erectile bodies will inflate the whole penis and make the penis rise.

- Since the erectile bodies continues backwards between the man's legs, also this area swells and fixes the penis rigidly so that it does not sway from side to side when fully erected.

Knut Holt is an internet consultant and marketer focusing on health items. TO FIND natural measures against erection problems, sexually stimulating herbal preparations, and natural medicines against digestive problems, allergy, asthma, acne, eczema, rosacea, scars, wrinkles, over-weight, hypertension, heart disease, hypothyroidism, hemorrhoids, depression and other common health problems, PLEASE VISIT:----

http://www.panteraconsulting.com

Article Source: http://EzineArticles.com/?expert=Knut_Holt

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