An ultrastructural examination of the mesoglea of Hydra

  • Lowell E. Davis
  • Julian F. Haynes


The survey of the mesoglea of four species of Hydra indicates a basic similarity of structure. In each species the mesoglea consists of an amorphous ground substance with three different types of fibers and particulate material dispersed in this matrix. A probable interpretation of the fine structure of the mesoglea is that collagen-like protein demonstrated by other investigators, forms all or part of the “beaded” fibers. Acid mucopolysaccharide which can be demonstrated histochemically probably corresponds to the amorphous ground substance in which the mesogleal fibers are dispersed. The role of the mesoglea as an extra-cellular skeleton and cementing substance is discussed.


Fine Structure Particulate Material Mucopolysaccharide Probable Interpretation Ground Substance 
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Copyright information

© Springer-Verlag 1968

Authors and Affiliations

  • Lowell E. Davis
    • 1
    • 2
  • Julian F. Haynes
    • 1
    • 2
  1. 1.Developmental Biology Center, Department of BiologyCase Western Reserve UniversityCleveland
  2. 2.Department of BiologyUniversity of Notre DameNotre Dame

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