Lipids

• includes fats, oils, and cholesterol
• found in butter, oils, nuts, and fatty meat
• provide long-term energy storage

  help insulate and protect our organs

  form the membranes of our cells

  make hormones and vitamin D
• Saturated


  one double bond

  no carbon carbon double bond
• Unsaturated


  two or more double bond

  has carbon carbon double bond
• Simple lipids


  fatty acids and glycerol

  concentrated sources of energy

  insulates and cushions organs
• Complex lipids


  additional components like phosphorus, nitrogen, or carbohydrates

  egg yolks, soybeans, and avocados

  cell membranes