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Blood returning to the mammalian heart in a pulmonary vein drains first into the _______?

Blood returning to the mammalian heart in a pulmonary vein drains first into the _______?

پلمونری رگ میں ممالیہ کے دل میں واپس آنے والا خون پہلے _______ میں جاتا ہے؟
Explanation
  • Blood returning from the lungs via the pulmonary vein enters the left atrium of the heart.
  • From the left atrium, the blood is pumped into the left ventricle for systemic circulation.