title: ELECTRON MICROSCOPE STUDIES ON OOCYTES AND ECHINODERM, THYONE BRIAREUS, WITH SPECIAL REFERENCE TO THE ORIGIN AND STRUCTURE OF THE ANNULATE LAMELLAE.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D003593:Cytoplasm; D004447:Echinodermata; D004583:Electrons; D008853:Microscopy; D008854:Microscopy, Electron; D008928:Mitochondria; D009865:Oocytes; D010063:Ovum; D012270:Ribosomes
keywords: CELL NUCLEUS; CYTOPLASM; ECHINODERMATA; MICROSCOPY, ELECTRON; MITOCHONDRIA; OVUM; RIBOSOMES