part_of adult salivary gland type II acini adult salivary gland type III acini adult salivary gland granular acini adlumenal interstitial cell Fig. 8-10, in Biology of Ticks ISBN:0-19-505910-7. Long narrow cells that are situated between the much larger granular secretory cells and extend from the central lumen almost to the periphery of the acinus. During feeding, the adlumenal cells enlarge and function as myoepithelial cells. TADS:0000137 TADS:0000137 default_namespace cell