Metabolism - The sum total of chemical reactions that occur within a living cell both to build new molecules within the cell and break down and assimilate sources of energy for the cell.⏎
Intravenous - The use of veins through which medications and solutions are administered.⏎
Immune System - The system of biological structures and processes that protects the body from foreign substances, including pathogens.⏎
Germ Theory - A theory in medicine stating that microorganisms are the causative agents of infectious, contagious diseases.⏎