 The nuclear envelope , otherwise known as nuclear membrane , consists of two cellular membranes , an inner and an outer membrane , arranged parallel to one another and separated by 10 to 50 nanometres ( nm ) . The nuclear envelope completely encloses the nucleus and separates the cell 's genetic material from the surrounding cytoplasm , serving as a barrier to prevent macromolecules from diffusing freely between the nucleoplasm and the cytoplasm . The outer nuclear membrane is continuous with the membrane of the rough endoplasmic reticulum ( RER ) , and is similarly studded with ribosomes . The space between the membranes is called the perinuclear space and is continuous with the RER lumen . 
 The nuclear envelope , otherwise known as nuclear membrane , <a href='uninflect' title='1'><mark>consists</mark></a> of two cellular membranes , an inner and an outer membrane , arranged parallel to one another and separated by 10 to 50 nanometres ( nm ) . The nuclear envelope completely <a href='uninflect' title='2'><mark>encloses</mark></a> the nucleus and <a href='uninflect' title='3'><mark>separates</mark></a> the cell <a href='null_genetive' title='4'><mark>'s</mark></a>genetic material from the surrounding cytoplasm , serving as a barrier to prevent macromolecules from diffusing freely between the nucleoplasm and the cytoplasm . The outer nuclear membrane <a href='drop_aux' title='5'><mark>is</mark></a>continuous with the membrane of the rough endoplasmic reticulum ( RER ) , and is similarly studded with ribosomes . The space between the membranes is called the perinuclear space and <a href='drop_aux' title='6'><mark>is</mark></a>continuous with the RER lumen . 
The nuclear envelope , otherwise known as nuclear membrane , consist of two cellular membranes , an inner and an outer membrane , arranged parallel to one another and separated by 10 to 50 nanometres ( nm ) . The nuclear envelope completely enclose da nucleus and separate the cell  genetic material from tdasurrounding cytoplasm , serving as a barrier to prevent macromolecules from diffusing freely between the nucleoplasm and the cytoplasm . The outer nuclear membrane continuous wid thdaembrane of thedaugh endoplasmic reticulum ( RER ) , and is similarly studded with ribosomes . The space between the membranes is called the dainuclear space and continuous with the Rdalumen .