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Ultrastructure of the carotid body.
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MedLine Citation:
PMID:  5971007     Owner:  NLM     Status:  MEDLINE    
An electron microscope investigation was made of the carotid body in the cat and the rabbit. In thin-walled blood vessels the endothelium was fenestrated. Larger vessels were surrounded by a layer of smooth muscle fibers. Among the numerous blood vessels lay groups of cells of two types covered by basement membranes. Aggregates of Type I cells were invested by Type II cells, though occasionally cytoplasmic extensions were covered by basement membrane only. Type I cells contained many electron-opaque cored vesicles (350 to 1900 A in diameter) resembling those in endocrine secretory cells. Type II cells covered nerve endings terminating on Type I cells and enclosed nerve fibers in much the same manner as Schwann cells. The nerve endings contained numerous microvesicles ( approximately 500 A in diameter), mitochondria, glycogen granules, and a few electron-opaque cored vesicles. Junctions between nerve endings and Type I cells were associated with regions of increased density in both intercellular spaces and the adjoining cytoplasm. Cilia of the 9 + 0 fibril pattern were observed in Type I and Type II cells and pericytes. Nonmyelinated nerve fibers, often containing microvesicles, mitochondria, and a few electron-opaque cored vesicles (650 to 1000 A in diameter) were present in Schwann cells, many of which were situated close to blood vessels Ganglion cells near the periphery of the gland, fibrocytes, and segments of unidentified cells were also seen. It was concluded that, according to present concepts of the structure of nerve endings, those endings related to Type I cells could be efferent or afferent.
T J Biscoe; W E Stehbens
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of cell biology     Volume:  30     ISSN:  0021-9525     ISO Abbreviation:  J. Cell Biol.     Publication Date:  1966 Sep 
Date Detail:
Created Date:  1967-09-07     Completed Date:  1967-09-07     Revised Date:  2010-06-22    
Medline Journal Info:
Nlm Unique ID:  0375356     Medline TA:  J Cell Biol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  563-78     Citation Subset:  IM    
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MeSH Terms
Carotid Body / blood supply,  cytology*
Nerve Endings / cytology*
Schwann Cells / cytology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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Journal Information
Journal ID (nlm-ta): J Cell Biol
ISSN: 0021-9525
ISSN: 1540-8140
Publisher: The Rockefeller University Press
Article Information
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Received Day: 17 Month: 2 Year: 1966
Print publication date: Day: 1 Month: 9 Year: 1966
Volume: 30 Issue: 3
First Page: 563 Last Page: 578
ID: 2107013
PubMed Id: 5971007

T. J. Biscoe
W. E. Stehbens
From the Departments of Physiology and Experimental Pathology, The John Curtin School of Medical Research, Canberra, Australia.
Dr. Biscoe's present address is The Cardiovascular Research Institute, San Francisco Medical Center, San Francisco, California

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