Maam i have a query, as the pulmonary artery gives deoxy blood to lungs, and pulmonary veins deposit oxygenated blood to the heart, then don't the lungs require oxygenated blood for proper functioning? And if they do, how do they get it?
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Solution
Lung is respiratory organ ,it is chief site for exchange of gases it is highly oxygenated and also make deoxygenated blood oxygenated.