Penis Anatomy
The anatomy of the penis is complex. It is comprised primarily of two cylinders of sponge-like vascular tissue that fill with blood thus creating an erection. Blood is then pumped into the penis under great pressure and a series of valves retain it in the penis maintaining the erection. A third cylinder is the urethra, a tube that carries the urine and the ejaculate. The head of the penis is called the glands. Blood flows to the penis by two very small arteries that come from the Aorta. These arteries are the same size as the arteries to your fingers.
The main problems that cause impotence is that the blood vessels become blocked and the blood cannot get to the penis. The other major problem is leakage of blood from the penis into the veins around the penis called a venous leak. This is very common, similar to a hole in a tyre. The larger the hole is, the more air that needs to be pumped into the tyre to keep it hard.
Anatomy Of The Penis
The skin covering the penis is extremely mobile and expandable. This is necessary for an erection as the skin of the penis is unique as it is controlled by the hormonal system. The head of the penis, the glands is an anatomically distinct feature covered by a foreskin. This is a double layer of skin that normally moves freely. Because of its movability and expanding abilities it is very sensitive to any degree of swelling and trauma, for this reason the skin of the penis can become massively swollen with minimal trauma in a short period of time.
The body of the penis is anchored to the pubic bone and a thickening of the rectus muscle anchors the top of the penis. The rectus muscles or "abs" are the muscles in the middle of the abdominal wall. This thickened layer, called the fundiform ligament, extends off the rectus muscle to anchor the penis. When this ligament is cut in so called penis lengthening operations it gives the impression of being longer although it simply hangs lower from the body because it’s detached.
