Blood pressure and heart rate?

can anyone explainy why blood pressure and heart rate differ when measured in a reclinging position and in a standing position?Blood pressure and heart rate?
Because your blood has less to pump less when you are reclining...it has to put less pressure into making sure the blood reaches your extremities
when you're reclining, gravity is not affecting your body as much, and there is more blood returning to your heart from your legs- that makes your blood pressure increase a bit and your heart rate to slow. when you're standing, gravity is making the blood from your legs harder to push back up to your heart, so your blood pressure drops and your heart rate increases. that's why sometimes you can get light-headed when you stand up too quickly from a sitting position.