title: Membrane fusion during spermiogenesis in Ascaris.
mesh_terms: D000818:Animals; D001200:Ascaris / Q000502:physiology* / Q000648:ultrastructure; D002462:Cell Membrane / Q000648:ultrastructure; D003593:Cytoplasm / Q000648:ultrastructure; D005614:Freeze Fracturing; D008297:Male; D013087:Spermatids / Q000648:ultrastructure; D013091:Spermatogenesis; D013094:Spermatozoa / Q000648:ultrastructure*