part of part of contributes to morphology of retina layer of retina AAO:0010353 Any of the layers that make up the retina[MP]. EMAPA:35742 FMA:58617 MA does not treat internal/external limiting memranes as layers - these are classified as laminae. Here we follow other ontologies in grouping with other layers. MA also treats retinal pigment epithelium and neural retina epithelium as distinct from the layers. We follow ontologies such as FMA and ZFA in first dividing into pigmented and neural layers - these are also classified as layers, giving us over the usual 10 layers MA:0001319 UBERON:0001781 UMLS:C0459649 XAO:0000266 retina layer retina neuronal layer retinal layer retinal neuronal layer uberon nervous system cell part layer