Chemical Compounds in Cells Element- any substance that can’t be broken down into simpler substances. - Ex: oxygen and nitrogen Compound- When two or more elements combine chemically, they form a compound. - Ex: water and carbon dioxide

Chemical Compounds in Cells Water- a) Made up of 2 hydrogen and 1 oxygen atoms b) Dissolves chemicals that cells need c) Most chemical reactions in cells could not take place withOUT water. d) Helps cells keep their size and shape. e) Helps maintain a stable temperature (water temp changes slower than air temp)

Chemical Compounds in Cells Organic compounds- contain carbon Inorganic compounds- do not contain carbon - Ex: water and salt

Components Function Examples in the Body Sources in the Diet Carbohydrates Proteins Lipids Nucleic Acids