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  • Adhesive digital pads  (1)
  • Enteropneusta  (1)
  • Springer  (2)
  • 1975-1979
  • 1970-1974  (2)
Collection
Publisher
  • Springer  (2)
Years
  • 1975-1979
  • 1970-1974  (2)
Year
  • 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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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 148 (1974), S. 407-416 
    ISSN: 1432-0878
    Keywords: Tree frogs ; Adhesive digital pads ; Transmission and scanning electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The digital pads of three tree-frogs (genus Rhacophorus) have been studied by transmission and scanning electron microscopy. The distal parts of the outermost epidermal cells are separated by wide gaps. The surface of these cells is characterized by stout microvillus-like processes. The apical plasma membrane is reinforced by a layer of electron-dense material attached to its inner side. The cytoplasm contains bundles of tonofilaments extending into the apical cellular processes, numerous ribosomes and abundant granular and vesicular inclusions. In the connective tissue under the epidermis mucous glands — characterized by granule-containing, mitochondria-rich and smooth muscle cells — and an extensive nerve plexus occur. The latter innervates the mucous glands and in addition consists of sensory fibres which have been found in connection with lamellated sensory corpuscles. In respect of the degree of adaption towards a tree-dwelling life, the excluvisely tree inhabiting species (Rhacophorus reinwardti) appears to be particularly advanced.
    Type of Medium: Electronic Resource
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