Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Mitochondrial genetic disorders ?
    ### Response:
    What are the signs and symptoms of mitochondrial genetic disorders? People with mitochondrial genetic disorders can present at any age with almost any affected body system. While some conditions may only affect a single organ, many involve multiple organ systems including the brain, muscles, heart, liver, nerves, eyes, ears and/or kidneys.
    