B3 2.2 Keeping the blood flowing

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  • B3 2.2 Keeping the blood flowing
    • Substances diffuse in and out of the blood in the capillaries.
    • Damaged heart valves can be replaced.
    • The main types of blood vessels are arteries, veins and capillaries
    • Stents can be used to keep narrowed or blocked arteries open.

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