part_of adult female reproductive system adult cervical vagina Fig. 16-2, Fig. 16-3, Fig. 16-12, in Biology of Ticks ISBN:0-19-505910-7. TADS:0000428 TADS:0000428 The cervical vagina is the thick muscular zone of the vagina. The cervical vagina is lined with a thick layer of highly foldedcuticle some 13 - 25 microns thick, a thick complex epithelium of cuboidal and tall columnar cells and, finally, an especially layerof smooth muscle. The cervical vagina opens into the vestibular vagina at its anterior end, the connecting tube at itspostero-ventral end and the seminal receptacle at its posterodorsal end. The cervical vagina serves as the organ responsible forexpelling the eggs from the reproductive tract, i.e., it functions as an ovipositor, during oviposition. default_namespace simple organ female organism