Why is the nucleus pushed to one side

Adipose connective tissue cells are specialized for fat storage and do not form ground substance or fibers.  On prepared slides, adipose tissue appears somewhat like a fish net with white spaces connected together in a network.  The cytoplasm and nucleus have been pushed to one side by a single, large, fat-filled vacuole that occupies the center of the cell.  In this  cross section from the trachea,  the adipose cells  are located in the outer most layer (adventitia) of the organ.

then that particular organisms become extinct.