When you think about it, men ought to know a lot about our penises. We use them on a regular basis for different purposes and judging by the huge amount of jokes and nicknames surrounding this organ, we are very interested in them. But how much do we really know about the penis? Ask any man who has no medical training of what exactly is the penis made of and you will probably get a blank stare. It's a fact that most men go through in life without having any idea about how the penis works and what it is made of.

To begin with, the penis is a sandwich of tissues designed to allow the passing of urine and sperm out of the body. Just under the skin lies a thin layer of tissues that wraps everything together and underneath that are the two main parts of the penis: the Corpora Cavernosa and the Corpus Spongiosum. The Corpus Spongiosum is an elongated mass of spongy tissue ending in the urethral bulb (glans) and can be felt by running a finger along the underside of the penis. Its main function is to house the urethra and to prevent its compression during erection.

The Corpora Cavernosa are two sponge-like regions of tissue whose only role is to make erections possible. When the nervous system sends the signal, the Corpora Cavernosa starts to fill with blood coming from arteries down the length of the penis. Outside these two bits of tissue lie the veins that take the blood out of the penis when the erection subsides. A layer of dense tissue called the Tunica Albuginea contains the expansion of the two Corpora Cavernosa and maintains the shape of the penis. The Tunica expands all the way to protect the glans penis, but it's much thinner around the glans.

Knowing all this, it's easy to understand what penis enlargement exercises are all about. The size of the two Corpora Cavernosa places a limit on how long the penis is in the flaccid state and how much it can expand during erection. This means that if you can force the spongy tissue to grow in size, you can increase the number of inches in both length and girth. Exercises focus on forcing parts of the Corpora Cavernosa to accommodate more blood than usual by shifting the blood around in the penis. The effect is an overall increase in size as the tissue expands in order to cope with the situation.

It is important to perform the exercises on a regular basis because the tissue needs the constant pressure that leads to change. The Corpus Spongiosum and the Tunica Albuginea will increase in size along with the rest of the penis, but the the two Corpora Cavernosa are the keys to penis enlargement because they hold between them 90% of the blood involved in an erection (the rest goes into the Corpus Spongiosum). That's the theory behind penis enlargement exercises. Now you know why you can gain inches by following the PenisHealth? program.