the human body

Organ system, organ, tissue, cell, molecule, atom, organism

Atom, molecule, cell, tissue, organ, organ system, organism

Molecule, atom, cell, tissue, organ, organ system, organism

Cell, tissue, molecule, atom, organ, organ system, organism

Atoms are the largest units in the human body.

Atoms are basic units of a chemical element.

Atoms are composed of multiple molecules.

Atoms are only found in bones.

Molecules are groups of atoms bonded together.

Molecules are the basic structural units of the body.

Adenine is an example of a molecule.

Molecules are composed of cells.