Over millions of years evolution has designed a masterpiece of anatomical engineering in the form of the male penis. Whether its duty is to expel waste liquids, bring new life into the world, or enjoy the carnal pleasures of copulation, the penis can do it all.
However, few men properly understand the mechanics of how their seemingly simple tool of pleasure works, so below we’ll delve a little deeper into the basics of penile anatomy.
Aside from the flesh, ligaments, nerves, smooth muscle and blood vessels etc, the main structures of the penis are as follows:
Corpora cavernosa - These are the two main blood holding chambers which run parallel at the top of the penis. The Corpora cavernosa is filled with an intricate network of erectile tissue which becomes engorged with blood upon arousal, causing the penis to become erect.
Corpus spongiosum – This chamber runs the length of the penis beneath the Corpora cavernosa chambers and houses the urethra. Its primary function is to expel urine and semen out of the body. Attached to the end of these three chambers is the head of the penis called the glans. The distinctive mushroom shaped area is covered with nerves which aid in the sexual stimulation of the penis.
Tunica - The Corpora cavernosa and Corpus spongiosum are housed within the tunica, which acts as a tough but pliable protective sheath snugly encasing these three chambers. Through natural penis enlargement, the tunica is forced to repeatedly expand by pumping more blood into the Corpora cavernosa under pressure. This is a gradual process which ultimately leads to a wider and thicker penis.
How Erections Work
The penis is certainly one of the grooviest of body-parts, in that when it becomes excited it completely changes form. It goes from being a sullen shrunken piece of flesh cowering beneath the testicles, to a proud hard quivering pole signalling its excitement.
The stimulus to create an erection in a healthy male can be triggered fairly easily through any number of channels. A simple fleeting thought can be all it takes to cause sexual excitement, for the penis to stiffen with anticipation. Sound, touch, sight and smell can all have the same stimulatory effect.
Once the brain registers the signal, its swiftly dispatched down the spinal cord and into the pelvic nerves and the blood-supplying arteries which feed the corpora cavernosa. The large network of smooth muscle and spongy erectile fibers relax and fill with freshly oxygenated blood. This deceptively simple, yet highly intricate automated process can all happen in only seconds.
Once the Corpora cavernosa is filled to its maximum capacity, the tunica stretches and blocks off the outflow of blood. This process helps to increase the circulatory pressure, thereby keeping the freshly pumped blood locked in place to create a sufficiently hard and strong erection capable of penetration.