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Cell Wall and Cell Membrane By: Ben Pincus, Melinda Altamore, Christopher Scanlan, and Allie Camaratta Cell Wall Structure • Outside of cell membrane • Three layers of cell wall: Middle lamella, primary wall, and secondary wall • Middle Lamella- outer wall of the cell formed during cell division • Primary Wall- formed after middle lamella consists of a rigid skeleton • Secondary Wall- extremely rigid and provides compression strength Function/Importance • • • • • Surrounds cells Protects Cell Membrane Structural support and protection Determines shape of cell Allows exchange of substances Animal/Plant Cells • Only Plant Cells contain the Cell Wall • Animal Cells only have a tough Cell Membrane Cell Membrane Structure • Composed of lipids, proteins and carbohydrates • Lipids are the main fabric • Proteins determine the membranes functions Functions of Cell Membrane • Creates a barrier between the inside of the cell of the outside • Determines what goes in and out of the cell Animal and Plant Cells Animal and plant cells both have a cell membrane