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Secretory cells in the foregut of the echinopluteus

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Summary

Metachromatically-staining substances have been found in the secretion of the stomodeum and esophagus of the echinopluteus (Psammechanus miliaris). This secretion seemed to derive from specialized cells in the wall of the foregut. Ultrastructural examination revealed that these cells are rich in large cisternae containing an electron-translucent material. They are also rich in ribosomes and possess large Golgi complexes. The number of secretory cells increases with age. It is tempting to speculate that the function of these cells is analogous to that of the glandular cells of the endostyle in some chordate phyla.

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Authors and Affiliations

  1. The Wenner-Gren Institute for Experimental Biology, University of Stockholm, Norrtullsgatan 16, S-113 45, Stockholm, Sweden

    Ester Ryberg & Bo Lundgren

  2. AB Hässle, Fack, 431 20, Mölndal, Sweden

    Bo Lundgren

Authors
  1. Ester Ryberg
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  2. Bo Lundgren
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Ryberg, E., Lundgren, B. Secretory cells in the foregut of the echinopluteus. Wilhelm Roux' Archiv 177, 255–262 (1975). https://doi.org/10.1007/BF00848177

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  • DOI: https://doi.org/10.1007/BF00848177

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