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

Synonyms: stratum segmentorum externorum et internorum retinae retinal photoreceptor layer retina photoreceptor layer stratum segmentorum externorum et internorum (retina)

This is just here as a test because I lose it

Term information

database cross reference
Subsets

uberon_slim, pheno_slim, vertebrate_core

plural term
retinal photoreceptor layers [ ZFA:0000143 ]

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

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 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