The body of the penis extends from the root to the ends of the corpora cavernosa penis

Corpus cavernosum penis

The corpus cavernosum penis is one of a pair of sponge-like regions of erectile tissue which contain most of the blood in the penis during penile erection...

, and in it these corpora cavernosa are intimately bound to one another.

A shallow groove which marks their junction on the upper surface lodges the deep dorsal vein of the penis

Deep dorsal vein of the penis

The deep dorsal vein of the penis lies beneath the deep fascia of the penis; it receives the blood from the glans penis and corpora cavernosa penis and courses backward in the middle line between the dorsal arteries; near the root of the penis it passes between the two parts of the suspensory...

, while a deeper and wider groove between them on the under surface contains the corpus cavernosum urethræ.

The body is ensheathed by fascia

Fascia

A fascia is a layer of fibrous tissue that permeates the human body. A fascia is a connective tissue that surrounds muscles, groups of muscles, blood vessels, and nerves, binding those structures together in much the same manner as plastic wrap can be used to hold the contents of sandwiches...

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