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The ultrastructure of the toadfish vestibular sensory epithelium. A: Hair cells (HC) have dark nuclei (n) that are often deeply indented. The apical portions of the cells extend to the cuticular plate (cp), which supports the emerging stereocilia and kinocilium. B: Synaptic contacts between sensory hair cells (HC) and primary afferents (Aff) involve dense synaptic ribbons surrounded by halos of synaptic vesicles in the hair cells (arrows). Scale bars: 2 µm in (A), 0.5 µm in (B).
