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Function of the lungsThe function of the lungs is to transport  oxygen into the bloodstream and to take carbon dioxide out of the  bloodstream.trust me, my crappy college prâ¦ofessor told me so. he is  a poohead.
The main organ of the respiratory system is the lungs. The diaphragm is a muscle located underneath the heart and lungs that contracts to pull air into the lungs and relaxes to force air out of the lungs. When the air enters the lungs, it travels through the bronchi to tiny air sacs called alveoli.he main organ of the respiratory system is the lungs. The diaphragm is a muscle located underneath the heart and lungs that contracts to pull air into the lungs and relaxes to force air out of the lungs. When the air enters the lungs, it travels through the bronchi to tiny air sacs called alveoli.