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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 110 (1970), S. 204-218 
    ISSN: 1432-0878
    Keywords: Polychaetes ; Parapodia ; Glands ; Fine structure ; Mucus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The spiral organs of Nereis have been shown to be compound glands and not photoreceptors. The ducts of two or three types of secretory cells attach themselves in a serial manner to a spirally wound axial columella which lies just below the cuticle. The large intra-cellular ducts terminate in a number of fine ducts which penetrate the columella and open through it into the lumen of the gland. This communicates to the outside through a pore in the cuticle. The secretions are muco-polysaccharides which are probably mixed in the lumen before discharge.
    Type of Medium: Electronic Resource
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