Memory Cell MembranesVersión en línea Game for vocab on cell membranes por Joyce van den Hoven The part of a phospholipid that is polar. It attracts water. The outside of a cell. It is like a bag that keeps all the pieces inside the cell. The main part of a cell membrane. It has two parts, a head and a tail. The part that points towards water is polar (head), and the part that points away is non polar (tails). A cell is the smallest unit of a living thing. All living things are made of cells. bi-layer, something made of 2 layers Part of the cell membrane that helps big and/or polar (charged) things move in and out of a cell. The part of a phospholipid that is non polar. It repels water.