The Step Labeled 5 in the Diagram of Blood Flow

question 63

Multiple Choice

The step labeled 5 in the diagram of blood flow through the heart shows oxygenated blood returning from the lungs and entering the left atrium through the

• A)superior and inferior vena cavae
• B)ascending and descending aorta
• C)internal and external jugular veins
• D)pulmonary arteries
• E)pulmonary veins

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