About the Male Penis

The adult male has an average penis size of 2 to 3 inches long when flaccid. However, this length may differ daily, for example, when it is cold the penis often withdraws into the fatty tissue overlying the pubic bone, which may make it appear smaller. Although this happens, the natural length of the penis throughout all man holds little variation.

The external structure of the penis consists of three basic parts, the glans, the shaft and the base. The glans, commonly referred to as the head, is the most sensitive area of the penis. The fremum refers to the hypersensitive spot located underneath the glans.

The shaft makes up the part of the penis which travels from the tip to the base, where the base is the part of the penis attached to the scrotum. The scrotum refers to the sac which holds the sex glands that produce the sperm, commonly known as the testicles.

The internal structure of the penis also consists of three primary structural parts. In this instance however, these three structures are made up of tubes; two erectile bodies (corpora cavernosa), and the corpus spongiosum. The two erectile bodies run along the length of the penis, while the corpus spongiosum, which includes the urethra, runs along the underside of the shaft of the penis.

The erectile bodies are the part of the penis largely responsible for the erection. This is because the erectile bodies contain blood, and during an erection, the amount of blood inside theses cylinders increases. This happens as a result of an increase in the inflow and a decrease in the outflow of blood. The cylinders are subsequently filled to their limit with blood, forcing the penis to stand upright.

To ensure a good blood supply throughout an erection, several blood vessels run towards the erectile bodies and a dense web of small nerve fibers ensure the opening and closing of the right vessels. Also, given that no stiff structures, like a bone, exist in the penis, the penis is linked to the pubic bone through strong connective tissue, allowing it to remain relatively stable during an erection.

The urethra is designed to conduct urine to the outside world, but can only be considered a tube when it does; after the urine is expelled, the elastic fibers in its wall make sure it collapses. The penis merely serves as an extension of the urethra, thus enabling males to urinate with ease.

As you more than likely realise, the penis serves three main functions. These functions are made up of urination, sexuality and reproduction. Urination, as I mentioned earlier, is where the penis serves as an extension of the urethra. As such urinating is a rather simple function. Sexuality, simply put, refers to the ability of an erect penis to give pleasure, and reproduction refers to the importance of the erect penis, and the ability to ejaculate, in the reproduction process.

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