Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Gastrointestinal Bleeding ?
    ### Response:
    Your digestive or gastrointestinal (GI) tract includes the esophagus, stomach, small intestine, large intestine or colon, rectum, and anus. Bleeding can come from any of these areas. The amount of bleeding can be so small that only a lab test can find it.     Signs of bleeding in the digestive tract depend where it is and how much bleeding there is.
    