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Etude ultrastructurale de l'innervation des glandes salivaires postérieures chez Octopus vulgaris

I. Les troncs nerveux du canal salivaire

Ultrastructural study of the innervation of the posterior salivary glands in Octopus vulgaris

I. The nervous trunks of the salivary duct

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Summary

Two types of nerves, motor and secretory, are found in the wall of the salivary duct. The average diameter of the motor fibers is smaller and decreases still more towards the glands, while on the contrary it increases for the secretory fibers. The disparity of diameter between the two types of fibers is due to the different number of neurites they contain, embedded in satellite cells with mesaxons of various forms. Axons and satellite cells have similar cytological features in the two types of nerves. Vesicles of several morphological types occur in the axons; their significance is discussed.

Résumé

Le canal salivaire contient dans sa paroi deux types de nerfs, moteurs et sécréteurs. Le diamètre des fibres nerveuses est en moyenne plus faible dans les nerfs moteurs, où il diminue encore en direction des glandes, tandis qu'au contraire celui des fibres sécrétrices augmente, accentuant ainsi les différences morphologiques entre les deux ners. Ces différences de calibre entre les fibres sont en rapport avec le nombre plus ou moins élevé des neurites qu'elles comportent, et dont les mésaxones ont des formes variées. Les caractères cytologiques des cellules satellites et des axones des deux types de nerfs sont comparables. Les axones contiennent des vésicules de types morphologiques très divers dont la signification est discutée.

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Authors and Affiliations

  1. Faculté des Sciences, Laboratoire de Cytologie, Paris

    Colette Ducros

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  1. Colette Ducros
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Ducros, C. Etude ultrastructurale de l'innervation des glandes salivaires postérieures chez Octopus vulgaris . Z.Zellforsch 132, 35–49 (1972). https://doi.org/10.1007/BF00310295

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  • DOI: https://doi.org/10.1007/BF00310295

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