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Development of the endolymphatic sac in chick embryos, with reference to the degradation of otoconiaThe endolymphatic sac of chick embryos (from embryonic day 7 to 1-day-old chicks) was studied light- and electron-microscopically. At stage 30-31 (embryonic day 7-7.5), the epithelial cells of the endolymphatic sac were cuboidal to columnar in shape. Microvilli were relatively well developed. The intercellular space was wide. In the endolymphatic space of the endolymphatic sac, varying shapes and sizes of otoconia-like bodies were often observed. Intracytoplasmic phagosomes containing these bodies were rarely found. After stage 37 (embryonic day 11), otoconia-like bodies in the endolymphatic sac decreased in number and size. They were almost the same as the otoconia in the macular organs, ultrastructurally. These findings indicate that the endolymphatic sac of the chick embryos may possess the function of otoconial degradation and removal of calcium from otoconia.
Document ID
20050000817
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Yoshihara, T.
(Tokyo Women's Medical College Japan)
Kaname, H.
Narita, N.
Ishii, T.
Igarashi, M.
Fermin, C. D.
Date Acquired
August 22, 2013
Publication Date
January 1, 1992
Publication Information
Publication: ORL; journal for oto-rhino-laryngology and its related specialties
Volume: 54
Issue: 5
ISSN: 0301-1569
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Neuroscience
Non-NASA Center

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