title: An ultrastructural study of microtubules and the acrosome in spermiogenesis of Tubificidae (oligochaeta).
mesh_terms: D000177:Acrosome / Q000502:physiology / Q000648:ultrastructure*; D000818:Animals; D008297:Male; D008870:Microtubules / Q000648:ultrastructure*; D009835:Oligochaeta / Q000145:classification / Q000502:physiology / Q000648:ultrastructure*; D013082:Sperm Tail / Q000648:ultrastructure; D013087:Spermatids / Q000502:physiology / Q000648:ultrastructure; D013091:Spermatogenesis; D013094:Spermatozoa / Q000648:ultrastructure*