part_of adult midgut epithelial lining adult midgut secretory cell Differential epithelial cell that enlarge greatly during feeding and become flask shaped in appearance and fill with largenumbes of granule-filled vesicles. Secretion is accomplished by expulsion of the secretory granules (exocytosis). Coons et al (1986)dispute the existence of secretory cells and claim that they are merely different phases of digestive cell activity. Fig. 9-15; 9-24, in Biology of Ticks ISBN:0-19-505910-7. S1e cells S1m cells S2e cells TADS:0000184 TADS:0000184 default_namespace cell