I Ate

• digestive system

  takes food, breaks it down, absorbs the molecules and gets rid of what the body doesn't need
• mucous neck cells 


  Secrete thin, acidic mucus of unknown function
• Parietal cells 


  secrets Hydrochloric acid (HCl) and intrinsic factor
• chief cells 


  secrete Pepsinogen and lipases
• pepsinogen 


  inactive form of pepsin