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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 107 (1970), S. 234-239 
    ISSN: 1432-0878
    Keywords: Stomochord ; Chorda dorsalis ; Enteropneusta
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Das Stomochord von Harrimania kupfferi und Ptychodera flava, eine Ausbuchtung des Darmkanals der Enteropneusten, welche in das Präsoma hineinragt, besteht aus zwei Zelltypen: a) Epithelzellen, die durch Desmosomen verbunden sind und große Vakuolen besitzen; ihr distaler Zellsaum ist mit Mikrovilli und Zilien ausgestattet. b) Schleimzellen. An der Basis des Epithels kommen zahlreiche Nervenfasern vor, die Granula (Durchmesser etwa 1,500 Å) enthalten. Das Stomochord wird von einer Basallamina und Bindegewebsfasern umschlossen. Die Frage der Homologie des Stomochords mit der Chorda dorsalis wird diskutiert.
    Notes: Summary The stomochord of Harrimania kupfferi and Ptychodera flava. a tubular structure which extends from the oral cavity into the presoma, consists of two cell types: a) epithelial cells interconnected by desmosomes, which bear at their apical pole a brush-border and cilia. The largest part of these cells is occupied by a voluminous vacuole; b) mucus cells. In addition, at the base of the epithelium numerous nerve fibres occur, which are characterized by electron dense granules of about 1,500 Å diameter. The whole stomochord is surrounded by a basement lamina and connective tissue fibres. The question of homology between stomochord and notochord is discussed.
    Type of Medium: Electronic Resource
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