title: STUDIES ON THE ACROSOME. VII. FORMATION OF THE ACROSOMAL PROCESS IN SEA URCHIN SPERMATOZOA.
mesh_terms: D000177:Acrosome; D000818:Animals; D002463:Cell Membrane Permeability; D004447:Echinodermata; D004583:Electrons; D008297:Male; D008853:Microscopy; D008854:Microscopy, Electron; D012106:Research; D012617:Sea Urchins; D013094:Spermatozoa
keywords: CELL MEMBRANE PERMEABILITY; ECHINODERMATA; EXPERIMENTAL LAB STUDY; MICROSCOPY, ELECTRON; SPERMATOZOA