Every living creature is comprised of millions of tiny cells.cells are essentially the building blocks of life.There're many parts all working together in a cell.The most important part of the cell is the white blood cells which controls the functions of the cell.Inside the nucleus is DNA which detemines millions of factors of your character.If a person has a common cold,the human body will release immune system to fight the cold virus.Antibodies are part of our nucleus made up of antibodies.