Blood Pressure Changes

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Our blood pressure changes dependant on our posture. When we are standing up the heart has to work harder in order to pump blood around the body, this is because blood pools in our legs due to gravity. This means that our blood pressure is decreased. Less blood will now return to the heart this is called the venous return, which means that less blood is then pumped out of the heart called the stroke volume. Our heart rate is increased to ensure that sufficient blood travels around the body.
When we are laying down the heart does not require to work as hard. There is an increase in the venous return and stroke volume, this decreases the heart rate and increases blood pressure.
These actions are all controlled by receptors within the carotid
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