part of part of develops from develops from adjacent to adjacent to contributes to morphology of anatomical wall external ectoderm eyelid sclera anterior segment of eyeball conjunctiva AAO:0010343 GAID:898 MA:0000265 SCTID:181161008 wall of conjunctival sac XAO:0000182 Wikipedia:Conjunctiva NCIT:C12341 BTO:0003415 CALOHA:TS-2232 EFO:0000374 MESH:D003228 UBERON:0001811 FMA:59011 EV:0100340 The mucous membrane that lines the inner surface of the eyelids and the front of the eyeball. conjunctival sac ocular surface region