Evidence from electron micrographs for the passage of material through pores of the nuclear membrane.
D000818:Animals; D002466:Cell Nucleolus; D002467:Cell Nucleus; D003593:Cytoplasm; D003594:Cytoplasmic Granules; D004583:Electrons; D008853:Microscopy; D008854:Microscopy, Electron; D009685:Nuclear Envelope
CELL NUCLEUS; MICROSCOPY, ELECTRON