Labels:book | bulletin board | crt screen | door | earth | hakham | monitor | person | plaything | poster | road | sky | windowpane | workwear OCR: EXERCISING THE BODY HEN YOU EXERCISE, for example. when you start to run, your body increases its supplies of energy and oxygen to your muscles. HEART Muscles need the extra energy tc contract more pow rerfully, pulling on the bones Extra oxy gen Is required to release energy from the sugars in LUNGS food. Your lungs work harder. taking Walk in more oxygen and your heart pumps more blood. which carries the oxygen Run and pody to all parts of your body MUSCLES EXERCISING THE HEART heart can pump up to five times more blood to the body every minute when you exercise. The amount blood lea ving the heart each time itpumps increases by Electrica Signals of the Heart 10 percent. Also. the number of times the heart beats double its normal count These changes are per minute (the heart rate can mor ...
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