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Answer:

All cells are surrounded by cell membrane that controls the materials that move in and out of the cell :3

Step-by-step explanation:

:3

Answer: cell membrane

Step-by-step

explanation: Every cell in the body is enclosed by a cell (Plasma) membrane. The cell membrane separates the material outside the cell, extracellular, from the material inside the cell, intracellular. It maintains the integrity of a cell and controls passage of materials into and out of the cell.