Lymph nodes possess

Options

A. Extra lymph
B. Lymphocytes
C. Macrophages
D. All the above.

Answer

### Step-by-Step Solution:

1. **Understanding Lymph Nodes**: Lymph nodes are small, bean-shaped organs that are part of the lymphatic system. They are distributed throughout the body and are associated with lymphatic vessels.

2. **Components of Lymph Nodes**: Lymph nodes contain various types of cells that play crucial roles in the immune response. These include:
- **Extra Lymph**: Refers to the lymph fluid that circulates through the lymphatic system.
- **Lymphocytes**: These are a type of white blood cell that are essential for the immune system, helping to identify and eliminate pathogens.
- **Macrophages**: These are large white blood cells that engulf and digest cellular debris, foreign substances, and pathogens.

3. **Function of Lymph Nodes**: Lymph nodes act as filters for the lymph fluid, trapping foreign particles, bacteria, and cancer cells. This filtering process is vital for the proper functioning of the immune system.

4. **Choosing the Correct Option**: Given the components present in lymph nodes (extra lymph, lymphocytes, and macrophages), the correct answer to the question "Lymph nodes possess" is:
- **All of the above**.

### Final Answer:
Lymph nodes possess extra lymph, lymphocytes, and macrophages. Therefore, the correct option is **all the above**.

---