Cell Structure: Cell Membrane

Cell Structure: Cell Membrane
Biology4kids.com

Cell Membranes
Cell membrane is like a plastic bag We have been talking about cells being a unit of organization in biology. Let's look at the cell membrane and see how that membrane keeps all of the pieces inside. When you think about a membrane, imagine it is like a big plastic bag with some tiny holes. That bag holds all of the cell pieces and fluids inside the cell and keeps any nasty things outside the cell. The holes are there to let some things move in and out of the cell.

Please visit the website for illustrations and to learn more.