I know that it has to do with breathing and your lungs
Answer:
you inhale oxygen and exhale carbon dioxide.
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Insects become resistant to pesticides after being exposed to it for some time.
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C. Is the answer love....
The ductus arteriousus is a blood vessel that connects the pulmonary artery to the descending aorta. Otherwise known as the ductus Botalli, this structure pumps blood into the fetus' non-functioning lungs from the right ventricle. This blood vessel will close at birth and becomes the ligamentum arteriousum.