(A–C) Histological sections, mounted with Entellan, of four day-old adult’s seminal vesicles. Note: (A) the lumen, full of cellular fragments, (B) a prismatic epithelium region beside a cubic epithelium region, (C) epithelial cells with apical projections, containing nuclei, (D) TEM of four day-old adult luminal cell fragments, (E–F) histological sections: (E) of a seminal vesicle stained with DAPI to identify cell fragment nuclei. Notice the area occupied by secretion (s) that flowed from the deferent duct; (F) a post vesicular deferent duct, with cell fragments embedded in the PAS positive secretion. (e) vesicle epithelium, (ep) deferent duct epithelium, (ld) lipid droplets, (ms) muscular layer, (n) nuclei, (arrows) clear lipid droplets, (open arrows) luminal nucleated cellular structures, (arrowheads) membranous inclusions.