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Ultrastructural investigations on the muscular systems in the barnacle, Tetraclita squamosa japonica.
MedLine Citation:
PMID:  18620285     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Four muscular systems of the Tetraclita squamosa barnacle were observed by means of an electron microscope and it was revealed that these systems each bore different types of muscle cells. The four systems were the adductor (A), the lateral scutal depressor (LSD), the ventral scutal depressor (VSD), and the tergal depressor (TD). The A-system included cross stiated muscle cells which showed long sarcomeres (about 10 mum) and rather disordered arrays of myofilaments. The LSD-system included cross striated muscles which had medium length sarcomeres (about 6.7 mum) and rather ordered myofilamental arrays. The VSD-system was constructed of cross striated muscle cells which bore shorter sarcomeres (4.6 mum) than the previous three systems and ordered myofilamental arrays. This last type of cell also bore well-developed sarcoplasmic reticular systems. The TD-system included smooth muscle cells which showed rather ordered arrays of myofilaments and dense-bodies. Each muscular system, as described above, included to its advantage one type of cross striated or smooth muscle cell for its characteristic contraction. The relations between ultrastructures and functions of each muscular system will now be discussed.
Authors:
A Matsuno; S Hirota
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Tissue & cell     Volume:  21     ISSN:  0040-8166     ISO Abbreviation:  Tissue Cell     Publication Date:  1989  
Date Detail:
Created Date:  2008-07-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0214745     Medline TA:  Tissue Cell     Country:  Scotland    
Other Details:
Languages:  eng     Pagination:  863-74     Citation Subset:  -    
Affiliation:
Department of Biology, Faculty of Science, Shimane University, Matsue 690, Japan.
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