Figure 374 from Chapter 15 (Cytoplasmic Inclusions) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Cell type-f from Acinus III in the salivary gland of the tick Rhipicephalus appendiculatus. These cells are active in synthesis and secretion at the start of a blood meal. A prominent nucleolus, as shown here, is common in cells engaged in synthesis of large amounts of protein for export. A PDF copy of the accompanying chapter is available on the ASCB’s BioEDUCATE website.