Source:http://linkedlifedata.com/resource/umls/id/C0028584
MSH: The membrane system of the CELL NUCLEUS that surrounds the nucleoplasm. It consists of two concentric membranes separated by the perinuclear space. The structures of the envelope where it opens to the cytoplasm are called the nuclear pores (NUCLEAR PORE).,CSP: membrane system of the cell nucleus that surrounds the nucleoplasm.,GO: Either of the lipid bilayers that surround the nucleus and form the nuclear envelope; excludes the intermembrane space. [GOC:mah, GOC:pz],GO: The double lipid bilayer enclosing the nucleus and separating its contents from the rest of the cytoplasm; includes the intermembrane space, a gap of width 20-40 nm (also called the perinuclear space). [ISBN:0198547684],NCI: The double-layer membrane structure enclosing the nucleus in eukaryotic cells. It separates the DNA of the cell from the cytosol. For exchange of material, for example, proteins and mRNA, it is punctured with numerous nuclear pores.