cranial vasculature choroidal vascular plexus CVP Develops adjacent to the pigment epithelium of the eye. The choroidal plexus develops from the primitive mesencephalic artery. Initially blood enters from the mesencephalic central artery, and the dorsal ciliary vein. The plexus drains via the ophthalmic vein. Isogai et al. 2001. TAO:0005094 teleost_anatomy