The circulatory and respiratory system are connected at the lungs. The circulatory needs oxygen form the lungs to pump the blood around the body and the respiratory system supplies the oxygen and gets the oxygen from the air into your bloodstream.Sep 23, 2013
Medical doctors have the power to keep the society healthy or not-they can save lives. Without medical doctors, the death rate would be much higher then it is today. People would die younger as well.
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