MeSH definition : 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).;
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).