Until 2009, the human clitoris was an absolute mystery

The scientific name for the external “little button” or “bulb” [of the clitoris] is glans.  Not to be confused with glands, glans simply refers to a small circular mass.  This little structure contains approximately 8,000 sensory nerve fibers; more than anywhere else in the human body and nearly twice the amount found on the head of a penis… The fact is, though, that most of the clitoris is subterranean, consisting of two corpora cavernosa (corpus cavernosum when referring to the structure as a whole), two crura (crus when referring to the structure as a whole), and the clitoral vestibules or bulbs.

The glans is connected to the body or shaft of the internal clitoris, which is made up of two corpora cavernosa.  When erect, the corpora cavernosa encompass the vagina on either side, as if they were wrapping around it giving it a big hug!

The corpus cavernosum also extends further, bifurcating again to form the two crura.  These two legs extend up to 9cm, pointing toward the thighs when at rest, and stretching back toward the spine when erect.