Fine structure of photoreceptor cells in the earthworm, Lumbricus terrestris

@article{Rhlich2004FineSO,
  title={Fine structure of photoreceptor cells in the earthworm, Lumbricus terrestris},
  author={P. R{\"o}hlich and B. Aros and S. Vir{\'a}gh},
  journal={Zeitschrift f{\"u}r Zellforschung und Mikroskopische Anatomie},
  year={2004},
  volume={104},
  pages={345-357}
}
SummaryPhotoreceptor cells in the epidermis and nerve branches of the prostomium and in the cerebral ganglion of Lumbricus terrestris were investigated with the electron microscope. The photoreceptor cell is similar to the visual cell of Hirudo by having a central intracellular cavity (phaosome) filled with microvilli. Besides microvilli, several sensory cilia can also be found in the phaosome but they are structurally independent of the microvilli. A gradual branching of the phaosome cavity… Expand
The fine structure of prostomial photoreceptors in Eulalia viridis (Polychaeta; Annelida)
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A fine structural investigation was performed on receptor cells lying at the base of the epidermis in the earthworm, Lumbricus terrestris, finding a new epidermal receptor type that probably has a chemoreceptor function of hitherto unknown kind. Expand
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TLDR
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TLDR
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References

SHOWING 1-10 OF 30 REFERENCES
The fine structure of the eye of the leech, Helobdella stagnalis.
  • A. W. Clark
  • Biology, Medicine
  • Journal of cell science
  • 1967
SUMMARY The eye of the rhynchobdellid leech, Helobdella stagnalis, has been examined with the electron microscope. The eye is composed of a cup of pigment cells surrounding a compact mass ofExpand
Structure of the Photoreceptors in the Compound Eyespots of Branchiomma Vesiculosum
Each photoreceptor unit within the eye is located immediately beneath the surface cuticle and is composed of 2 cells; a superficially placed lens cell and a large, deeply situated receptor cell whichExpand
Fine structure of the segmental ocelli of Armandia brevis (Polychaeta: Opheliidae)
  • C. O. Hermans
  • Biology, Medicine
  • Zeitschrift für Zellforschung und Mikroskopische Anatomie
  • 2004
TLDR
The prostomial photoreceptors were re-examined and found in this material to be composed of microvilli rather than of folds containing labyrinthine tubular infoldings of the cell surface as previously reported. Expand
The fine structure of the lens and photoreceptors of Nereis virens
  • D. A. Dorsett, R. Hyde
  • Biology, Medicine
  • Zeitschrift für Zellforschung und Mikroskopische Anatomie
  • 2004
TLDR
Attention is drawn to the evolutionary parallel between the shadow reflex of Branchiomma and the “off” responses of the photoreceptors in the distal retina of Pecten, both animals being exceptional within their phyla in having photoreCEPTors of the ciliary type. Expand
Further observations on the fine structure of some invertebrate eyes
TLDR
Electron microscopy reveals the lens in the eye of nereid annelids to be composed of highly folded, interdigitating processes of the pigment cells of the retina. Expand
The leech photoreceptor cell: ultrastructure of clefts connecting the phaosome with extracellular space demonstrated by lanthanum deposition
TLDR
Mechanisms by which the initial events of photoreception bring about electrical events at the cell surface need not differ from those being considered for other photoreceptor cells. Expand
Das Auge von Platynereis dumerilii (Polychaeta) Sein Feinbau im ontogenetischen und adaptiven Wandel
TLDR
The pupillar region of light and dark-adapted specimens was examined and the kinetics of pupilar movements are discussed. Expand
Elektronenmikroskopische Beobachtungen an den Sehzellen des Blutegels, Hirudo medicinalis L.
SummaryThe visual cell of the leech (Hirudo medicinalis) contains a big vacuole filled with a moderate dense substance (“vitreous body”). The wall of the vacuole consists of a system of microvilliExpand
Fine structure of the prostomial eyes of Armandia brevis (Polychaeta: Opheliidae)
TLDR
The prostomial o celli of Armandia closely resemble the ocelli in the dorsal nerve cord of the protochordate Amphioxus, and it is suggested that the similarity is the result of evolutionary convergence. Expand
Nouvelles données histochimiques et ultrastructurales sur les photorécepteurs «branchiaux» de Dasychone bombyx (Dalyell) (Annélide Polychète)
  • A. Kerneis
  • Biology
  • Zeitschrift für Zellforschung und Mikroskopische Anatomie
  • 2004
TLDR
Each photoreceptor unit of Dasychone bombyx consists of aPhotoreceptor cell and a lens both enclosed in a collar composed of a «cellule pericristallinienne» and a pigmented cell and an extracellular cupule of the same morphological structure. Expand
...
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