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In order for your heart to function properly, it needs all of the above to work efficiently.
Blood is pumped around your body through a network of blood vessels:
Blood vessels have a layer of spiral muscle within their walls. This makes them able to widen or narrow depending on how much blood each part of your body requires. The action on these muscles is a very complex mechanism which is partly controlled by hormones.
How blood flows through your heart
Blood pressure is the measurement of the pressure within the arteries. It plays a vital role in the way your heart delivers fresh blood, containing the oxygen and nutrients required throughout your body, to all the blood vessels.
In order for blood to travel throughout your body, quickly enough, it has to be under pressure. This pressure is created by the relationship between three things: