Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Prevent diabetes problems: Keep your heart and blood vessels healthy ?
    ### Response:
    Narrowed blood vessels leave a smaller opening for blood to flow through. Having narrowed blood vessels is like turning on a garden hose and holding your thumb over the opening. The smaller opening makes the water shoot out with more pressure. In the same way, narrowed blood vessels lead to high blood pressure.
    