Shavorn cooper

5/7/12

The human heart

         In an average lifetime the heart beats more than two and a half billion times, without ever pausing to rest. Like a pumping machine, the heart provides the power needed for life The heart is one of the most important organs in the entire human body. It really does nothing more than pump's blood The average resting heart rate of adults is 60-100 beats per minute . The heart pumps the blood, which carries all the vital materials to and from our cells which help our bodies function and remove the waste that our bodied do not need.

        If the heart did not function our cell would not get the nutrients that our bodied need and the body would not be able to get rid of the toxic waste that our bodies dont need witch can be harmful.Blood that has already been to the cells and has given up its nutrients to them, is drawn from the body by the right half of the heart, and then sent to the lungs to be reoxygenated.Blood that has been reoxygenated by the lungs is drawn into the left side of the heart and then pumped into the blood stream and this cycle is repeated.In a trained athlete the average heart rate of around 50-60 bpm beats per minute This is called the cardiac ouput.This is why doctors say stay health and active and you would live longer, bucause the lesser stress on the heart the better you will be.