The left side of the heart receives oxygenated blood from:

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Question: The left side of the heart receives oxygenated blood from:

Option 1: Superior Vena Cava
- Incorrect. The superior vena cava brings deoxygenated blood from the upper body to the right atrium, not to the left side of the heart. It does not deliver oxygenated blood to the left side.

Option 2: Aorta
- Incorrect. The aorta carries oxygenated blood away from the left ventricle to the systemic circulation. It is downstream from the left side, not the source of incoming oxygenated blood to the left heart.

Option 3: Pulmonary Veins
- Correct. Pulmonary veins return oxygenated blood from the lungs to the left atrium, delivering blood to the left side of the heart which then pumps it to the systemic circulation through the left ventricle and aorta.

Option 4: Right Ventricle
- Incorrect. The right ventricle pumps deoxygenated blood to the lungs via the pulmonary arteries. It is part of the right heart, not the source of oxygenated blood for the left side.

Option 5: Pulmonary Arteries
- Incorrect. The pulmonary arteries carry deoxygenated blood from the right ventricle to the lungs for oxygenation. They feed the lungs, not the left heart, so they do not deliver oxygenated blood to the left side.

Summary: The key distinction is that oxygenated blood returns to the heart via the pulmonary veins and enters the left atrium, which is then passed to the left ventricle; all other vessels listed are involved with deoxygenated blood return (veins to the right heart) or oxygenated blood distribution after leaving the left heart (aorta).

2261 REHSCI 1200 SEC1010 Graded Quiz 6

The left side of the heart receives oxygenated blood from:

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