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Anatomy Term : FBbt:00004209 dorsal margin photoreceptor cell R8 Fly Anatomy

Namespace  fly_anatomy.ontology Obsolete  false
description  Any photoreceptor cell R8 (FBbt:00004227) that is part of some dorsal margin ommatidium (FBbt:02000000).

0 Cross References

1 Ontology

Name
Fly Anatomy

105 Parents

Identifier Name Description
FBbt:00006009 eye photoreceptor cell Photoreceptor cell that forms the core of each ommatidium in the adult eye. Eight of these photoreceptors are arranged in each ommatidial core, bundled like the staves of a barrel. Each has a photosensitive rhabdomere that projects into the barrel cavity and adjacent supporting membrane, the stalk (Wolff and Ready, 1993). Each extends an axon into the optic lobe. Activation of the photoreceptor by light results in depolarization and in histamine release at the synapses of these axons (Sarthy, 1991).
FBbt:00003004 adult  
FBbt:00004508 eye A bilaterally paired compound sense organ of the adult head that functions in visual perception.
FBbt:00004225 photoreceptor cell R7 Inner photoreceptor cell of the ommatidium whose centrally located rhabdomere extends across the distal two thirds (approximately) of each ommatidium. Each has a single axon that extends through a single lamina optic cartridge without making synapses. This axon crosses the first optic chiasm and extends through a single column of the medulla where it makes pre-synaptic contacts, mainly with medulla layers M1 and M5 (Takemura et al., 2008) before terminating in M6. It also receives synaptic input from photoreceptor cell R8 (Takemura et al., 2008), mostly in M3, and is presynaptic to Dm8a (in M6) and Tm5a (Gao et al., 2008).
FBbt:00005162 photoreceptor A light sensitive sense organ.
FBbt:00005098 peripheral nervous system The outer parts of the nervous system that perform sensory and motor functions.
FBbt:00000004 head  
FBbt:00004200 retina The array of photoreceptors and the cells that support them in a compound eye.
FBbt:00004211 photoreceptor cell  
FBbt:00005106 neuron Electrically active cell of the nervous system which has an axon and/or dendrite and which is synapsed with other cells and/or has other cells synapsed to it.
FBbt:00003007 adult head Head of the adult organism.
FBbt:00005125 interneuron A neuron that is neither a sensory receptor nor a motor neuron.
FBbt:00005094 central nervous system Collective name for all the nerve centers and their connective in the insect's body. In the context of Drosophila refers to the part of the nervous system consisting of the brain and ventral ganglia.
FBbt:00003708 lamina Lateral-most synaptic neuropil domain of the optic lobes, lying just beneath the compound eyes. It is composed of an array of repetitive cartridge-like units, each of which receives axons from specific sets of ommatidia in the compound eyes.
FBbt:00003748 medulla The second optic neuropil, sandwiched between the lamina and the lobula complex. It is divided into 10 layers: Layers 1-6 make up the outer medulla, and the seventh (or serpentine) layer exhibits a distinct architecture. Proximal to this, layers 8-10 make up the inner medulla.
FBbt:00005168 external sensory organ  
FBbt:00003624 adult brain Brain of the adult.
FBbt:00004227 photoreceptor cell R8 Inner photoreceptor cell of the ommatidium whose centrally located rhabdomere extends across the proximal third (approximately) of each ommatidium. Each has a single axon that extends through a single lamina optic cartridge (FBbt:00003747) without making synapses. This axon crosses the first optic chiasm and enters the equivalent column of the medulla, making presynaptic contacts in M1-3 and terminating in M3. Presynaptic contacts in M1 are mainly to lamina monopolar neurons L1 and L5 (Takemura et al., 2008). Presynaptic contacts to photoreceptor R7 are more distal - concentrated in M3 (Takemura et al., 2008). It also makes presynaptic contacts to Tm9 (Gao et al., 2008).
FBbt:00003701 optic lobe A region of the adult brain that processes visual information from the compound eyes.
FBbt:00000003 segment One of the repeated divisions of the whole organism.
FBbt:00005155 sense organ Multicellular anatomical structure with largely bona fide boundary that transduces some sensory stimulus to the nervous system.
FBbt:00005137 ganglion Any of a number of aggregations of neurons, glial cells and their processes, and surrounded by a glial cell and connective tissue sheath (plural: ganglia).
FBbt:00003921 optic chiasm The projection of axons between the lamina and medulla (1st optic chiasm) or between the medulla and lobula (2nd optic chiasm). The linear order of axons along each horizontal row of retinotopic columns is reversed by the chiasm.
FBbt:00003623 adult central nervous system Central nervous system of the adult.
FBbt:00005163 sensory organ cell Any somatic cell (FBbt:00100318) that is part of some sense organ (FBbt:00005155).
FBbt:00005095 brain The supra-esophageal ganglion of the central nervous system, composed of three primitive ganglia known as protocerebrum, deuterocerebrum and tritocerebrum. In the context of Drosophila it refers to the pre-oral ganglionic mass of the central nervous system containing the ventral ganglia.
FBbt:00005093 nervous system All the nerve centers and nerve fibers in the central, visceral and peripheral nervous systems.
FBbt:00003747 optic cartridge Segment (column) of the lamina defined by the distal-proximal (eye to central brain) projections of photoreceptor cells of a single ommatidium.
FBbt:00003718 lamina monopolar neuron A monopolar, intrinsic columnar neuron whose cell body lies in the cortex of the lamina and that has a single major projection that projects along a single lamina optic cartridge, crosses the first optic chiasm and terminates in the equivalent column of the medulla.
FBbt:00003627 protocerebrum The most anterior of the segmental subdivisions of the insect CNS; thought to represent the first pre-oral segment of the brain. The protocerebrum comprises many discrete neuropil regions including the central body complex and mushroom bodies.

249 Relations

Relationship
Parent Term . Name

Parent Term . Identifier

Child Term . Name

Child Term . Identifier
part_of dorsal margin ommatidium FBbt:02000000 dorsal margin photoreceptor cell R8 FBbt:00004209
is_a photoreceptor cell R8 FBbt:00004227 dorsal margin photoreceptor cell R8 FBbt:00004209
is_a dorsal margin photoreceptor FBbt:00004207 dorsal margin photoreceptor cell R8 FBbt:00004209
overlaps adult procephalic segment FBbt:00003010 dorsal margin photoreceptor cell R8 FBbt:00004209
has_presynaptic_terminal_in anatomical structure FBbt:00007001 dorsal margin photoreceptor cell R8 FBbt:00004209
has_presynaptic_terminal_in organism subdivision FBbt:00007009 dorsal margin photoreceptor cell R8 FBbt:00004209
has_presynaptic_terminal_in adult protocerebrum FBbt:00007145 dorsal margin photoreceptor cell R8 FBbt:00004209
overlaps adult labral segment FBbt:00003011 dorsal margin photoreceptor cell R8 FBbt:00004209
has_soma_location sense organ FBbt:00005155 dorsal margin photoreceptor cell R8 FBbt:00004209
has_presynaptic_terminal_in anterior-posterior subdivision of organism FBbt:00057001 dorsal margin photoreceptor cell R8 FBbt:00004209
has_synaptic_terminal_in brain FBbt:00005095 dorsal margin photoreceptor cell R8 FBbt:00004209
has_synaptic_terminal_in nervous system FBbt:00005093 dorsal margin photoreceptor cell R8 FBbt:00004209
has_synaptic_terminal_in central nervous system FBbt:00005094 dorsal margin photoreceptor cell R8 FBbt:00004209
synapsed_to cell FBbt:00007002 dorsal margin photoreceptor cell R8 FBbt:00004209
synapsed_to intrinsic neuron FBbt:00003664 dorsal margin photoreceptor cell R8 FBbt:00004209
synapsed_to anatomical structure FBbt:00007001 dorsal margin photoreceptor cell R8 FBbt:00004209
synapsed_to lamina monopolar neuron L5 FBbt:00003725 dorsal margin photoreceptor cell R8 FBbt:00004209
is_a sensory organ cell FBbt:00005163 dorsal margin photoreceptor cell R8 FBbt:00004209
synapsed_to columnar neuron FBbt:00005129 dorsal margin photoreceptor cell R8 FBbt:00004209
part_of adult peripheral nervous system FBbt:00005892 dorsal margin photoreceptor cell R8 FBbt:00004209
overlaps adult nervous system FBbt:00003559 dorsal margin photoreceptor cell R8 FBbt:00004209
overlaps adult tagma FBbt:00003005 dorsal margin photoreceptor cell R8 FBbt:00004209
overlaps adult FBbt:00003004 dorsal margin photoreceptor cell R8 FBbt:00004209
overlaps adult head FBbt:00003007 dorsal margin photoreceptor cell R8 FBbt:00004209
has_presynaptic_terminal_in organ system subdivision FBbt:00007330 dorsal margin photoreceptor cell R8 FBbt:00004209
has_synaptic_terminal_in multi-cell-component structure FBbt:00007060 dorsal margin photoreceptor cell R8 FBbt:00004209
overlaps adult segment FBbt:00003006 dorsal margin photoreceptor cell R8 FBbt:00004209
has_soma_location adult tagma FBbt:00003005 dorsal margin photoreceptor cell R8 FBbt:00004209
has_soma_location adult head FBbt:00003007 dorsal margin photoreceptor cell R8 FBbt:00004209
is_a inner photoreceptor cell FBbt:00006008 dorsal margin photoreceptor cell R8 FBbt:00004209

0 Synonyms