Labels:book | bottle | bulletin board | crt screen | hakham | monitor | person | plant | plaything | poster | sky | tribute album | windowpane OCR: W HAT HAPPENS HEN Y OU EXER CISE? HEN YOU START to exercise your body increases the supply of oxygen and energy to your muscles. It does this in two ways HEART your lungs work harder taking in more oxygen which transt ferred tc your bloodstream; and your heart beats faster pumping more oxygen- LUNGS rich blood to your muscles. Here the oxygen helps to release the extra energy needed by your m uscles. Run MUSCLES FXERCISING THE HEART During exercise, your heart can pump UD to five times more blood around your body The amount of blood leaving the heart eaeh time 11 pumps Electrical Signals of the Heart increases by 10 to 35 per cent. Also, the num ber of times the double its normal count. These activity heart beats per minute can more than changes are recorded on the graph above. muscies tra ...
