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3. Which statement shows the main function of the lungs? The lungs_____.
A. makes mucus to trap germs
B. regulates the acidity of the body
C. filters small gas bubbles in the blood stream
D. transports oxygen into the bloodstream while taking out carbon dioxide​


Sagot :

Answer:

d.

Explanation:

because lungs is a part of respiratory system where it jobs about inhaling oxygen and metabolizing carbon dioxide