what is blood pressure?
In: Biology
Gravity is constantly pulling your blood down. In order to keep the blood flowing against gravity and circulating in your body, your heart and blood vessels have to squeeze the blood a little. That bit of pressure ensures each beat of the heart can push enough blood up to the brain against gravity.
When we measure blood pressure we get 2 numbers. The top number is the pressure of your blood when your heart squeezes it to circulate. The bottom number is the pressure of your blood between squeezes.
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