Which of the following blood vessel contain maximum amount of urea?

Options

A. (I) dorsal aorta
B. (2) hepatic vein
C. (3) renal artery
D. (4) hepatic artery

Answer

To determine which blood vessel contains the maximum amount of urea, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Urea in the Body**:
- Urea is a waste product formed from the breakdown of proteins (specifically amino acids) in the liver.

2. **Identify the Blood Vessels in the Options**:
- The options provided are:
1. Dorsal aorta
2. Hepatic vein
3. Renal artery
4. Hepatic artery

3. **Analyze Each Option**:
- **Dorsal Aorta**: This is a major artery that carries oxygenated blood from the heart to the body. It does not specifically carry urea.
- **Hepatic Vein**: This vein carries blood away from the liver. Since the liver is responsible for converting amino acids into urea, the hepatic vein will have a high concentration of urea.
- **Renal Artery**: This artery carries blood to the kidneys, where waste products, including urea, are filtered out. However, it does not carry the highest concentration of urea.
- **Hepatic Artery**: This artery supplies oxygenated blood to the liver. It does not carry urea as it is not a product of the liver yet.

4. **Conclusion**:
- Among the options, the **hepatic vein** carries the maximum amount of urea because it transports blood that has already passed through the liver, where urea is produced.

### Final Answer:
The blood vessel that contains the maximum amount of urea is the **hepatic vein**.

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