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what kind of blood- oxygen-rich or oxygen-poor -leaves the lungs and return to the heart. Support your answer...PLSSS HELP MEHHHH!!! T^T

Sagot :

Deoxygenated blood (oxygen-poor blood) ENTERS the lungs to get oxygen and release carbon dioxide. This transforms the blood into Oxygenated. Therefore, Oxygenated or Oxygen-rich blood leaves the lungs to return to the heart to be pumped throughout the body.
oxygen-rich blood leaves the lungs.
blood is first pumped to the lungs to be oxygenated.. and then the newly oxygenated (oxygen-rich) blood leaves the lungs and goes back to the heart :)