Penis Enlargement that works. The male penis is comprised primarily of two cylinders of sponge-like vascular tissue that fills with blood to create an erection. Blood is pumped into the penis under great pressure and a series of valves keep it in the penis to maintain the erection. A third cylinder is the urethra, a tube that carries the urine and the ejaculate. The knobby head of the penis is called the Glans.
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 finger. These are attached to the abdomen or the pubic bone. The fact is that size in not really a question of race. On the whole, most men of all races measure in average 6 inches when erect. It is the flaccid size that varies quite a bit.