> 
> What gives the nucleus
>  its shape is a mesh of intermediate filaments called the nuclear
>  lamina. It forms an interface between the chromosomes and the inside
>  of the nuclear envelope. If these large protein fibres were to be
>  temporarily separated into their component nuclear lamina, the nuclear
>  envelope would pull away from the chromosomes and withdraw into the
>  endoplasmic reticulum. Problem solved.
> 
> 
> 

I am confused by the last sentence starting with "If these large proteins..." Could someone explain this in another way? I would appreciate any response. Thanks!