Wed,26 October 2011
The penis has 3 main structures: the corpora cavernosa, the corpus spongiosum, and the tunica albuginea. The corpora cavernosa, which is filled with sponge-like tissue, extends the entire length of the penis. The tunica albuginea is the membrane that covers and protects the corpora cavernosa. The corpus spongiosum, in the middle of the penis, houses the urethra, the opening at the end of the penis through which a man urinates and ejaculates. There is also a network of tissues, muscles, arteries, and veins running through the penis, which allows it to fill with blood and stiffen for an erection.
< |
