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The human body requires a constant stream of oxygen to stay alive the respiratory system is responsible for providing oxygen to the bodys cells while removing carbon dioxide a waste product that can be lethal if allowed to accumulate there are three major parts of the respiratory system the airway the lungs and the muscles of respiration. The human body book the respiratory system the human lungs are amazing feats of nature they pump vital oxygen through airways and into the bloodstream every second of every day without this ability humans could not survive on earth the human body book the respiratory system explains the science behind the amazing human respiratory system. The design of the respiratory system the human gas exchanging organ the lung is located in the thorax where its delicate tissues are protected by the bony and muscular thoracic cage the lung provides the tissues of the human body with a continuous flow of oxygen and clears the blood of the gaseous waste product carbon dioxide. The respiratory system the human body pdf free download the human lungs are amazing feats of nature they pump vital oxygen through airways and into the bloodstream every second of every day without this ability humans could not survive on earth