Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Marfan Syndrome ?
    ### Response:
    Marfan syndrome is a condition in which your body's connective tissue is abnormal. Connective tissue helps support all parts of your body. It also helps control how your body grows and develops.
                
Marfan syndrome most often affects the connective tissue of the heart and blood vessels, eyes, bones, lungs, and covering of the spinal cord.
    