part of part of in taxon develops from develops from capable of part of capable of part of regulation of pH Sauropsida optic choroid vasculature of eye pecten oculi https://upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Birdeye.jpg/700px-Birdeye.jpg A comb-like structure of blood vessels belonging to the choroid in the eye of a bird or reptile. It is non-sensory and is a pigmented structure that projects into the vitreous body from the point where the optic nerve enters the eyeball. The pecten is believed to both nourish the retina and control the pH of the vitreous body. pecten Wikipedia:Pecten_oculi UBERON:0007622 ventral optic cup derivative ventral part of optic cup