male accessory gland secondary cell FBbt:00004961 fly_anatomy.ontology Cell type found in at the distal tip of both lobes of the male accessory gland. These cells are large, spherical and binucleate with large vacuoles. There are approximately 43 secondary cells interspersed with around 1000 main cells per lobe. secondary secretory cell semen-secreting cell of the male accessory gland