TEM of seminal vesicle epithelium of adults with: (A–B) one day of age, (B) detail of membranous inclusions and lipid droplets; (C–F) Four day-old adults, (D–F) membranous inclusions in higher magnification. (ld) lipid droplets, (mi) membranous inclusions, (mt) mitochondria, (p) plasmatic membranes, (arrowheads) septated junctions.