Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Pleural Disorders ?
    ### Response:
    Your pleura is a large, thin sheet of tissue that wraps around the outside of your lungs and lines the inside of your chest cavity. Between the layers of the pleura is a very thin space. Normally it's filled with a small amount of fluid. The fluid helps the two layers of the pleura glide smoothly past each other as your lungs breathe air in and out.
    