Special cutaneous receptor organs of fish. VII. Ampullary organs of mormyrids
| Autor: | R. Bruce Szamier, Michael V. L. Bennett |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
Presynaptic dense body
Tight junction Sensory Receptor Cells Vesicle Fishes Lumen (anatomy) Anatomy Biology Microscopy Electron medicine.anatomical_structure Afferent nerve fiber Cutaneous receptor Nerve Degeneration medicine Animals Animal Science and Zoology Ampulla Receptor Developmental Biology Skin |
| Zdroj: | Journal of morphology. 143(4) |
| ISSN: | 0362-2525 |
| Popis: | Ampullary receptor organs of African mormyrids consist of a cavity beneath the epidermis. The wall of the cavity contains embedded receptor cells and two types of supporting cells. A canal extends from the cavity to an opening at the surface. The lumen of the canal and the ampulla are filled with a jelly-like material and dense cylinders apparently secreted by two types of supporting cells. Flattened cells of the canal wall are joined by occluding junctions. Synapses between receptor cells and the afferent nerve fiber are characterized by a presynaptic dense body, but presynaptic vesicles were not observed. Degenerating receptor cells are occasionally seen among normal receptor cells in the base of the organ. |
| Databáze: | OpenAIRE |
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