Citation:
These are complex cells with a nucleus and other organelles, all enclosed within membranes. They make up organisms in the Protista, Fungi, Plantae, and Animalia kingdoms.
This is the control center of the cell that contains DNA.
Organelle: These are specialized structures within a cell that perform specific functions.
This acts as a protective barrier to the uncontrolled flow of water and dissolved substances into and out of the cell.