Blood returning to the mammalian heart in a pulmonary vein drains first into the (A) left atrium. (C) left ventricle. (B) right atrium. (D) right ventricle.
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Step 1: Blood returning from the lungs in a pulmonary vein drains into the left atrium of the heart. Show more…
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Blood returning to the mammalian heart in a pulmonary vein drains first into the a. left atrium. b. right atrium. c. left ventricle. d. right ventricle.
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