part of ends during starts during eye death tissue choroid xenopus_anatomy XAO:0004460 2012-09-09T03:31:52Z eriksegerdell Portion of tissue comprising the vascular layer of the eye, containing connective tissue and lying between the retina and the sclera. It provides oxygen and nourishment to the outer layers of the retina. Along with the ciliary body and iris, it forms the uveal tract. uveal tract NF stage 44