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Fig. 4. Ultrastructure of a gill filamentary chloride cell of FWU Dicentrarchus
labrax. Note the presence of numerous mitochondria in the median part of
the cell and the well-developed tubular system that is an extension of the
basolateral cell membrane (A,B). The apical cell part presents a few
microridges (A,C). BM, basement membrane; CC, chloride cell; J, junction; MI,
mitochondria; MR, microridges; PVC, pavement cell; TS, tubular system. Scale
bars, 2 µm (A), 0.7 µm (B), 1 µm (C).