The nuclear membrane, also known as the nuclear envelope, is similar to the cell membrane in that it is a double-layered structure that surrounds and protects the contents of the nucleus, just as the cell membrane surrounds and protects the contents of the cell. Both membranes regulate the movement of molecules in and out of the structure they enclose, controlling what can enter and exit the nucleus and cell. Additionally, both membranes are composed of phospholipids and proteins that help maintain their structure and function.
