InterFIG 6: Arcade cells in tadpole stage (1.7 fold) embryo.

TEM, transverse section, dorsal is top. (Inset) Level of section in the head. Anterior sensory depression is on the right. Anterior arcade cell (beige line) reaches the future buccal opening, which is also surrounded by socket cells of the head sensilla and hyp1 and hyp 2. XXXR is not visible at this level. (Sd) Sensory depression; (aa) anterior arcade. Bar, 1 μm. (Image source: [MRC] Tadpole stage embryo-head A1009-5.)

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