This structure is the boundary of the cell that separates everything inside of the cell from everything in the
outside world. But it does so much more—it also enables passage of the necessary molecules into the cell
and allows waste material to exit the cell.]
Plasma membraneThe plasma membrane is the border between the interior and exterior of a cell. As such, it controls passage of various molecules—including sugars, amino acids, ions, and water—into and out of the cell.
