Blood pressure in the pulmonary artery is

Options

A. more than that in the carotid
B. more than that in the pulmonary vein
C. less than that in the venae cavae
D. same as that in the aorta

Answer

To determine the blood pressure in the pulmonary artery, we need to analyze the options provided and understand the relationship between the pulmonary artery, pulmonary vein, and other blood vessels.

### Step-by-Step Solution:

1. **Understanding Blood Pressure in Vessels**: Blood pressure varies in different types of blood vessels. Generally, arteries have higher blood pressure compared to veins because they carry blood away from the heart under higher pressure.

2. **Comparing Pulmonary Artery and Pulmonary Vein**: The pulmonary artery carries deoxygenated blood from the right ventricle of the heart to the lungs. In contrast, the pulmonary veins carry oxygenated blood from the lungs back to the left atrium of the heart. Since the pulmonary artery is an artery, it will have a higher blood pressure than the pulmonary vein.

3. **Analyzing the Options**:
- **Option 1**: More than that in carotid - This is incorrect because the carotid artery has higher pressure than the pulmonary artery.
- **Option 2**: More than that in pulmonary vein - This is correct as established earlier.
- **Option 3**: Less than that in the vena cava - This is incorrect because the pulmonary artery has higher pressure than the vena cava.
- **Option 4**: Same as that in aorta - This is incorrect because the aorta has the highest blood pressure in the body.

4. **Conclusion**: Based on the analysis, the blood pressure in the pulmonary artery is indeed more than that in the pulmonary vein.

### Final Answer:
The blood pressure in the pulmonary artery is **more than that in the pulmonary vein**.

---