Organism, A functioning life form, an animal, a plant, cell, etc., Molecule, A compound made out of a conjunction of atoms, Atom, The principal single unit that makes up everything and cant be destroyed, Cell, An organic unit found in living beings, Organ system, A group of organs that work together, Organ, A body part that makes the organism function, Tissue, The material that forms organs in living beings, Element, They are made up of atoms of the same type

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