Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Appendicitis ?
    ### Response:
    The appendix is a small, tube-like organ attached to the first part of the large intestine. It is located in the lower right part of the abdomen. It has no known function. A blockage inside of the appendix causes appendicitis. The blockage leads to increased pressure, problems with blood flow, and inflammation.
    