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CONTINUITY of NUCLEAR MBR with RER & SER
The bilayered nuclear envelope confines the nucleoplasm. The outer lamella of the nuclear membrane undulates at one site around the nuclear circumference and has continuity with the rough endoplasmic reticulum (RER). RER mbr has folded stacks (red arrow) that are lined with interposed “ribosomes” as particles attached to their surface. Thin bridges of membrane show continuity of the RER with the nuclear mbr. (Blue Arrows).