From smallest to the largest:
Atom-basic unit of matter; Molecule-series of atoms linked to bonds; Macromolecule- large molecule used in large biological polymers like nucleic acids and proteins; Organelle -specialized structures within a living cell ;nucleus; Cell -building blocks of life ;Tissue-cluster of cells meant enact a specific function ;Organ-sets of tissue that help body function ;Organ System- many organs performing one general function ; Organism- many organ systems
