ELECTRON MICROSCOPE STUDIES ON THE FINE STRUCTURE OF NEREIS SPERMATOZOA BEFORE AND AFTER THE ACROSOMAL REACTION.
D000818:Animals; D004583:Electrons; D006376:Helminths; D006652:Histological Techniques; D008297:Male; D008853:Microscopy; D008854:Microscopy, Electron; D010063:Ovum; D013094:Spermatozoa
HELMINTHS; HISTOLOGICAL TECHNICS; MICROSCOPY, ELECTRON; OVUM; SPERMATOZOA