| Name: | photoreceptor outer segment layer |
|---|---|
| Synonyms: | photoreceptor outer segment layers |
| Definition: | Layer of the retina composed of the outer segments of the photoreceptor cells. The photoreceptor outer segment is a specialized primary cilium consisting of a microtubule-based axoneme and regular stacks of membrane folds or disks containing the photopigments (opsins) required for the phototransduction cascade. |
| Ontology: | Anatomy Ontology [ZFA:0001466] |
| Name: | degenerate |
|---|---|
| Synonyms: | degeneration |
| Definition: | A structural quality inhering in a bearer whose structure deteriorates or is lost over time due to an active pathological process. |
| Ontology: | Phenotypic Quality Ontology [PATO:0000639] |