part_of adult seminal receptacle adult seminal receptacle epithelial lining Fig. 16-2, Fig. 16-15, in Biology of Ticks ISBN:0-19-505910-7. TADS:0000438 TADS:0000438 The epithelium of the seminal receptacle is multi-layered with many large cuboidal cells containing huge nuclei, some as largeas 30 microns. These cells enlarge greatly after the female is inseminated and show ultrastructural features characteristics ofsecretory activity. The nature of the secretions is unknown. Other smaller cells also occur. default_namespace portion of tissue