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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 lungs primary role is for gas exchange. It allows Carbon Dioxide (CO2) from the body's organs/muscles to leave the body via the bloodstream and Oxygen (O2) to enter the blâ¦oodstream to the body's organs/muscles.