Hypophyseal portal system is found in

Options

A. Kidney
B. Liver
C. Brain
D. Heart

Answer

### Step-by-Step Solution:

1. **Understanding the Hypophyseal Portal System**:
The hypophyseal portal system is a network of blood vessels that connects the hypothalamus to the anterior pituitary gland in the brain.

2. **Identifying the Function**:
The primary function of the hypophyseal portal system is to facilitate the transport and exchange of hormones between the hypothalamus and the anterior pituitary. This allows for rapid communication between these two critical glands.

3. **Analyzing the Options**:
The question provides four options: kidney, liver, brain, and heart. We need to determine where the hypophyseal portal system is located.

4. **Evaluating Each Option**:
- **Kidney**: The blood vessels in the kidney are primarily the renal arteries and veins. There is no hypophyseal portal system in the kidney.
- **Liver**: The liver has a hepatic portal system that transports blood from the gastrointestinal tract to the liver, but it does not have a hypophyseal portal system.
- **Heart**: The heart is part of the cardiovascular system, which is responsible for the overall flow of blood, but it does not contain a hypophyseal portal system.
- **Brain**: The hypophyseal portal system is specifically found in the brain, connecting the hypothalamus and the anterior pituitary.

5. **Conclusion**:
Based on the analysis, the correct answer to the question is that the hypophyseal portal system is found in the **brain**.