http://www.womenshealthinwomenshands.org/Anatomy.htm. Link also has photos of external genitalia. Lots of variation among women!
Muscles Underneath Clitoris
Two pairs of long slender muscles frame the pelvic outlet. One pair (the ischiocavernosus) runs alongside the pelvic bones, forming two sides of the triangle, with the glans of the clitoris at its apex. The other pair (the transverse perineal muscles) extends laterally from the perineum and connects these muscles, forming the base of the triangle. A third pair of muscles (the bulbocavernosus) also extend from the glans of the clitoris within the triangle downward under the outer lips, connecting at the perineum. You can locate these muscles by squeezing as if you wanted to stop the flow of urine or a bowel movement.
During orgasm, these muscles, which lie just beneath the top layer of skin and fat, all contract in unison, compressing the soft, engorged tissues of the clitoris between them. At the same time, they compress the more interior tissues between themselves and the underlying broad layers of muscles.
A small ligament divides the cartilage when the pubic bones meet. It is attached to the clitoral shaft and draws it and the glans up during sexual arousal. The round ligament of the uterus (or womb) runs along each side of the lips of the clitoris.
Erectile Tissue of the Clitoris
Cross Section of the Clitoris
Clitoris in Pelvis
Outer/Inner View of Non-Erect Clitoris
Outer/Inner View of Excitement-Plateau
Outer/Inner View of Orgasm
Outer/Inner View of Resolution
Inner View of Aroused Clitoris
Inner View of Clitoris at Resolution
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