Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Digestive Diseases ?
    ### Response:
    When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion.      Your digestive system is a series of hollow organs joined in a long, twisting tube. It runs from your mouth to your anus and includes your esophagus, stomach, and small and large intestines.
    