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How does exercise affect the body?

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How does exercise affect the body? My aim is to find out how exercise affects the body? Background knowledge. * Breathing. * Respiration. * Circulatory system. * Homeostasis. Here are the subtitles above in more detail: Breathing. The respiratory centre controls breathing, this is located at the rear of the human brain. To be more precise in the medulla. On average a human being will breathe about 12 breathes per minute inhaling on average 0.5dm3 per breath this means that they take in around 6dm3 of air per minute. The breathing rate of every one is always changing to suit their needs. If the body s inactive the rate of breathing will be low and if active i.e. in a game of football then the breathing rate will increase. The rate increases because on the increase in production of carbon dioxide. The amounts of carbon dioxide in the blood are detected by the chemoreceptors in the brain. So in theory the increase in the amount of carbon dioxide in the blood will make the breathing rate increase at a steady rate. The breathing rate will also increase to stop the muscles from getting fatigued and this means the increase in oxygen will increase the performance of the muscles because respiration can take place easier with a lot of oxygen to combust with in the cells. ...read more.


If the heart us at its resting rate and you sprint away then the heart has to work extremely fast to catch up with the body at this pace. If I don't get an increase in my pulse rate then my body must be extremely healthy or it has no reaction to the exercises that I am doing. Here is a diagram of the heart: The heart pumps blood in the following order starting at the pulmonary artery it then goes to the lungs where it is oxygenated; it then goes back to the heart via the pulmonary vein into the left atrium. From the left atrium it goes through the heart and into the left ventricle then into the Aorta which then goes on a trip around the body removing and supplying cells with vital nutrients required. It then returns to the heart via the Vena Cava into the right atrium then down into the right ventricle and finally pumped back up through the pulmonary artery to start its trip around the body again. The red blood cells carry the oxygen and are described as biconcave discs, the name of the protein that picks up the oxygen in the red blood cells are called haemoglobin and when it picks up oxygen it becomes oxyhaemoglobin. ...read more.


the number of breathes and this then needs the heart to increase its rate to supply the cells with oxygen enriched blood. My body temperature will only rise a little bit and this will only be a small amount as my body is able to control its temperature because of homeostasis as mentioned above in the background knowledge. Homeostasis also controls the glucose levels in the blood, so homeostasis will increase the amounts of glucose in the blood to suit the exercise that is currently being done at the time. Equipment. The equipment that I will be using is as follows: - * Stop watch. * Head thermometer. * Sports kit. * Trainers.(safety reasons) * Pen and paper. I will use the equipment above to carry out the tests that I require to get the results that I need to make an accurate and clear conclusion. I will keep myself safe by wearing trainers to give some form of shock absorption and this will also increase the amount of grip that I have to stay well balanced. I will also make sure that my shoe laces are tied to prevent unwanted trips. I will keep it a fair test by keeping the amount of time per test the same and keep the time that I take to do my pulse and breathing rate the same to get accurate and clear results. ...read more.

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