The corpus cavernosum of the clitoris is one of a pair of sponge-like regions of erectile tissue that engorge with blood during an erection.

[1] The clitoris also has two vestibular bulbs beneath the skin of the labia minora (at the entrance to the vagina), which expand at the same time as the glans clitoridis to cap the ends of the corpora cavernosa.

This contains irregular blood-filled spaces, lined by endothelium, and separated by connective tissue septa.

[1] In some circumstances, release of nitric oxide precedes relaxation of the clitoral cavernosal artery and nearby muscle, in a process similar to male arousal.

More blood flows in through the clitoral cavernosal artery, the pressure in the corpora cavernosa clitoridis rises.