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an organelle that surrounds the cell and controls what goes into and comes out of the cell (kind of like your skin)
a group of cells that work together to perform a specific job (muscle tissue, skin tissue, etc.)
a group of two or more tissues that work together to perform a specific job (heart, liver, lungs, skin, etc.)
a group of organs that work together to perform a specific job (like the digestive system, the muscular system, the respiratory system, etc.)
The Cell Theory
1.) All organisms are mad of one or more cells. 2.) The cell is the basic unit of all living things. 3.) All cells come only from other cells.
a jelly like fluid that allows organelles and chemicals to move safely around inside the cell
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