Oxygenated blood is carried to the heart by which of the following?

Options

A. Pulmonary vein
B. Pulmonary artery
C. Renal vein
D. Renal artery

Answer

To answer the question "Oxygenated blood is carried to the heart by which of the following?" we need to analyze the options provided:

1. **Pulmonary Vein**
2. **Pulmonary Artery**
3. **Renal Vein**
4. **Renal Artery**

### Step-by-Step Solution:

**Step 1: Understand the role of each blood vessel.**
- The **Pulmonary Vein** carries oxygenated blood from the lungs to the heart.
- The **Pulmonary Artery** carries deoxygenated blood from the heart to the lungs.
- The **Renal Vein** carries deoxygenated blood away from the kidneys to the heart.
- The **Renal Artery** carries oxygenated blood from the heart to the kidneys.

**Step 2: Identify the vessel that carries oxygenated blood to the heart.**
- Among the options, the **Pulmonary Vein** is the only vessel that carries oxygenated blood to the heart.

**Step 3: Trace the path of oxygenated blood.**
- Oxygenated blood from the lungs enters the heart through the **Pulmonary Vein**, then it goes to the **Left Atrium**. From the Left Atrium, it moves to the **Left Ventricle**, and finally, it is pumped into the aorta to supply the rest of the body.

**Conclusion:**
- The correct answer is the **Pulmonary Vein**.