APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -During exercise, your body may need three or four times your normal cardiac output, because your muscles need more oxygen when you exert yourself. During exercise, your heart typically beats faster so that more blood gets out to your body.

Detailed explanation-2: -While exercising, the muscles need additional energy as: the breathing rate and volume of each breath increases to bring more oxygen into the body and remove the carbon dioxide produced. the heart rate increases, to supply the muscles with extra oxygen and remove the carbon dioxide produced.

Detailed explanation-3: -Red blood cells carry the oxygen that muscles and other cells need during exercise. The more exercise people do, the more oxygen their cells need, so their blood has to deliver more oxygen to the cells.