Ultrastructure of the supporting cells in the paratympanic organ of chicken,Gallus gallus domesticus

Autor:	Maria Giambelluca, Riccardo Ruffoli, Francesco Giannessi
Rok vydání:	1998
Předmět:	Basement membrane Gap junction Anatomy Biology Golgi apparatus symbols.namesake medicine.anatomical_structure Cytoplasm medicine Ultrastructure symbols Animal Science and Zoology Tympanic cavity Hair cell Developmental Biology Type II Hair Cell
Zdroj:	Journal of Morphology. 236:65-73
ISSN:	1097-4687 0362-2525
Popis:	The paratympanic organ is a specialized sensory organ of birds located in the medial wall of the tympanic cavity. It possesses a sensory epithelium formed by type II hair cells and supporting cells. The supporting cells are tall, narrow units that extend from the basement membrane to the free epithelial surface. They show a fine structure characterized by numerous mitochondria, a conspicuous Golgi complex and a well-developed RER. Moreover, some uncommon structures, probably formed by heaped RER cisternae, are frequently present in the cytoplasm. Adjacent supporting cells are connected by numerous and extensive gap junctions; moreover, small gap junctions between hair cell and supporting cells are to be found. The possible mechanical and metabolical functions of the paratympanic organ supporting cells are discussed. J. Morphol. 236:65–73, 1998. © 1998 Wiley-Liss, Inc.
Databáze:	OpenAIRE
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