Renal veins opens into

Options

A. Ventral aorta
B. Dorsal aorta
C. Inferior venacava
D. Aortic arch

Answer

### Step-by-Step Solution:

1. **Understanding the Renal Veins**: Renal veins are blood vessels that carry deoxygenated blood away from the kidneys. Each kidney has its own renal vein.

2. **Pathway of Blood Flow**: Blood flow to and from the kidneys is crucial for understanding where the renal veins lead. Oxygenated blood is delivered to the kidneys through the renal arteries, while deoxygenated blood is returned to the heart via the renal veins.

3. **Connection to the Heart**: After the renal veins exit the kidneys, they do not go directly to the heart. Instead, they join a larger vein.

4. **Identifying the Large Vein**: The large vein that the renal veins connect to is the inferior vena cava. This vein is responsible for carrying deoxygenated blood from the lower parts of the body back to the heart.

5. **Conclusion**: Therefore, the renal veins open into the inferior vena cava, which is the correct answer.

### Final Answer:
Renal veins open into the inferior vena cava.

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