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Figure 6 | Frontiers in Zoology

Figure 6

From: A new sensory organ in “primitive” molluscs (Polyplacophora: Lepidopleurida), and its context in the nervous system of chitons

Figure 6

The ultrastructure of the Schwabe organ in Leptochiton asellus . A., Nerve projecting towards the base of an epithelial projection; B., Nerves leaving the epithelium form a synapse in the mesoderm; C., Nerve bundle surrounded by pigment granules in the epithelium; D., An overview of the sensory epithelium. Abbreviations: bas, basal cell; cil, cilia; gran, granular cell; lam, basal lamina; ner, nerve; pig, pigment granule; pre, putative presynaptic vesicles; pos, putative post-synaptic density; sup, supporting cell; asterisk, nerve penetrating the basal lamina. Scale bars: A., B., C. = 2 μm; D. = 10 μm.

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