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How do atoms of cells formed?
 Cells contain molecules that are made up of even smaller components called atoms. Atoms, molecules, cells, tissues, organs, and organ systems are the body's building blocks.
An atom is the smallest possible piece of an element that retains all the properties of that element.
 For example, a hydrogen atom reacts the same as a barrel full of hydrogen. Each atom is a building block. If you put two atoms of hydrogen (H) together, you get a molecule (H2). If you add that molecule of hydrogen to an atom of oxygen (O), you create a molecule of water. A molecule is a conglomerate of atoms.

Our body contains many different types of molecules that form the working parts, such as cells, as well as substances produced by some of those parts, such as hormones.



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