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Cell | Definition, Types, Functions, Diagram, Division, Theory,
Cell (biology) - Wikipedia
What Is a Cell? | Learn Science at Scitable - Nature
Intro to cells (article) | Khan Academy
Introduction to the cell (video) | Khan Academy
Structure of a cell | Biology library | Science | Khan Academy
Cell Biology | Learn Science at Scitable - Nature
The cell: Types, functions, and organelles - Medical News Today
Cell: Cell - Cell Press
Cell - Structure, Organelles, Metabolism | Britannica