The layer within the retina where the photoreceptor cell receptor segments reside. [ ZFA:0000143 http://en.wikipedia.org/wiki/Layer_of_rods_and_cones ]

This is just here as a test because I lose it

Term information

database cross reference
Subsets

uberon_slim, pheno_slim, vertebrate_core

latin term
stratum segmentorum externorum et internorum retinae [ FMA:58680 FMA:TA ]

plural term
retinal photoreceptor layers [ ZFA:0000143 ]

definition

The layer within the retina where the photoreceptor cell receptor segments reside.

depicted by

http://upload.wikimedia.org/wikipedia/commons/5/55/Gray881.png

external ontology notes

we follow MA and ZFA in subdividing this into inner and outer segments

has exact synonym

stratum segmentorum externorum et internorum retinae

retinal photoreceptor layer

retina photoreceptor layer

stratum segmentorum externorum et internorum (retina)

has related synonym

retinal photoreceptor layers

layer of rods and cones

homology notes

(...) an essentially similar sequence of events occurs during the embryonic development of the vertebrate eye. The eye initially develops as a single median evagination of the diencephalon that soon bifurcates to form the paired optic vesicles. As each optic vesicle grows towards the body surface, its proximal part narrows as the optic stalk, and its distal part invaginates to form a two-layered optic cup. (...) The outer layer of the optic cup becomes the pigment layer of the retina, whereas the inner layer differentiates into the photoreceptive cells and neuronal layers of the retina.[well established][VHOG]

id

UBERON:0001787