Which pathway does oxygenated blood follow in the human body?
1 )
pulmonary artery → left and right atria → left and right ventricles
2 )
pulmonary artery → left atrium → left ventricle → aorta
3 )
pulmonary vein → left and right atria → left and right ventricles
pulmonary vein → left atrium → left ventricle → aorta
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