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A. Some serosa cells (sc) grow around the host trachea (tr) (arrowhead in A). B. The apical side of some other serosa cells forms microvilli projections (mvp) that extend deeply into the host fat body (fb). Scale bars = 10 µm in A and 5 µm in B. Abbreviations: bl, blastocoel; fb, fat body; mvp, microvilli projections; nu, nucleus; tr, trachea; sc, serosa cells.
