Blood cells and a brain to control it . It's that simple .
With exercise your resting heart rate should be reduced as your heart is more effecient at pumping blood and does not need to work as hard.
All of your organs are involved with the heart. The heart pumps blood to all the organs in your body.
83% of people need an artificial heart and have died because of it.
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Both increase during exercise. If the exercise is sufficient to exceed the limits of cardiac output (that is, if the heart rate gets up to about 180 bpm) then the heart is stimulated to increase in size and strength. Thus - slowly - exercise will cause the resting heart rate to slow down.
Your heart may need to work harder when your body requires more oxygen. For instance, if you are exercising, your heart rate increases to keep up with the muscles' oxygen requirements.
in british heart foundations
You probably need to download the patch from the homepage.
Because theres no gravity.
As you exercise, the muscles need more oxygen to work. The heart beats faster to get the oxygenated blood from the lungs to the muscles. The harder you exercise, the more oxygen the muscles need, the faster the heart beats.
Because you are making the heart work faster,so it has to pump more blood around it.
Obvious answer your heart and your muscles need plenty of oxygen and if you don't have enough oxygen, your heart needs to work harder so you don't die.
Work of Heart was created in 1982.
With exercise your resting heart rate should be reduced as your heart is more effecient at pumping blood and does not need to work as hard.
If you don't have blood pumping around the body, the heart wouldn't be able to get everything it need in the blood stream to work and if the heart doesn't work most of your muscles won't work either causing you to die. :(
How the Heart and Circulatory system work.
how does the heart work