English, 11.05.2021 22:30, icantspeakengles

How do the lungs help us breathe? They pump oxygen through the blood vessels and carbon dioxide into the heart.
They take in oxygen as we inhale and release carbon dioxide as we exhale.
They take in oxygen as we inhale and release nutrients as we exhale.
They take in nutrients as their muscles contract and release carbon dioxide as they relax.

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How do the lungs help us breathe? They pump oxygen through the blood vessels and carbon dioxide int...