MaleProcFIG 13D: Dark-staining vesicles suggest secretory function for Bε(l/r).aav and vas deferens cell.

MaleProcFIG 13D: Dark-staining vesicles suggest secretory function for B?(l/r).aav and vas deferens cell.

TEM, transverse view. (Image source: N2Y [MRC] PAG 980.)
See MaleProcFIG 13A for overview of region highlighted.