| Name: | retina | 
|---|---|
| Synonyms: | retinas | 
| Definition: | Multi-tissue structure that contains the retinal neural layer and the retinal pigmented epithelium, and develops from the optic cup. | 
| Ontology: | Anatomy Ontology [ZFA:0000152] | 
| Name: | leukocyte | 
|---|---|
| Synonyms: | immune cell, leucocyte, white blood cell | 
| Definition: | An achromatic cell of the myeloid or lymphoid lineages, found in blood or other tissue. | 
| Ontology: | Anatomy Ontology [ZFA:0009309] |