Atom to Organism

Just go through these definition so that this term can seem to you familiar.

Atom              : Fundamental and unstable unit of cell

Molecule        : Fundamental and stable component of cell

Organelle        : Combination of different biomolecules

Cell                 : Structural and functional unit of living organism

Tissue             : Combination of simillar types of cells

Organ             : Combination of different tissues

Organ system : Combination of different organ

Organism       : A fully functional life form which is capable of growth and reproduction

Everything in the universe is made up of molecules. Right! Molecules are made up of atom. Atom is considered as fundamental unit which has no independent existence. Atoms are combined among themselves to form molecules to become existent in nature.