While the penis is one of the least harmed organs, accidents can happen. Though not common, large hospitals may see a number of cases of penile injuries each year.
How Does the Penis Normally Work?
The main roles of the penis are to carry urine and sperm out of the body. There are 3 tubes inside the penis. One is called the urethra. It is hollow and carries urine from the bladder through the penis to the outside. The other 2 tubes are called the corpora cavernosa. These are spongy tubes that are soft until filled with blood during an erection. The 3 tubes are wrapped together by a very tough fibrous sheath called the tunica albuginea. During sex, the stiffness of the penis makes it hard enough to be inserted into the woman's vagina. In this case, the urethra acts as a channel for semen to be ejaculated into the vagina.