Middle man of the body is

Options

A. Plasma
B. Lymph
C. WBC
D. RBC

Answer

### Step-by-Step Solution:

1. **Understanding the Concept of Body Fluids**:
- The human body contains various fluids that play crucial roles in physiological processes. Among these fluids, lymph is significant for its role in the circulatory and immune systems.

2. **Defining Lymph**:
- Lymph is a clear fluid that is similar to plasma but contains fewer proteins. It is part of the lymphatic system and is essential for transporting nutrients, waste products, and immune cells throughout the body.

3. **Role of Lymph as a Middle Man**:
- Lymph is often referred to as the "middle man" because it facilitates the exchange of gases (like oxygen and carbon dioxide) and nutrients between blood and tissues. It collects excess interstitial fluid (fluid that surrounds cells) and returns it to the bloodstream.

4. **Terminology**:
- Lymph is also known as tissue fluid or interstitial fluid. These terms highlight its location and function in the body.

5. **Conclusion**:
- Given its critical role in the exchange of substances between blood and tissues, lymph is aptly termed the "middle man" of the body. Therefore, the answer to the question is that the middle man of the body is lymph.

### Final Answer:
- The middle man of the body is **lymph**.

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