Body of penis

Structure

The body of the penis is suspended from the pubic symphysis. It has two surfaces; the dorsal and the ventral or urethral. The penile raphe runs on its ventral surface.

The body is surrounded by a bi-layered model of tunica albuginea in which a distal ligament buttresses the glans penis and plays an integral role to the penile fibroskeleton, and the structure is called "os analog", a term coined by Geng Long Hsu in the Encyclopedia of Reproduction. This indispensable structure is a continuation of the body of the human penis, differing from other mammalian penises, in that it has no baculum (or erectile bone) and instead relies exclusively on engorgement with blood to reach its erect state. It is a remnant of the baculum that evolved likely due to change in mating practice.

A shallow groove, which marks their junction on the upper surface lodges the deep dorsal vein of the penis, which is flanked by a pair of cavernosal veins of the penis, while a deeper and wider groove between them on the surface below contains the corpus spongiosum. The body is ensheathed by fascia, which includes tunica albuginea, Buck's fascia, dermis, and skin.