Phagocytic endothelial cells are

Options

A. Monocytes
B. Kupffer's cells
C. Lymphocytes
D. Plasma cells.

Answer

### Step-by-Step Solution:

1. **Understanding Phagocytic Endothelial Cells**:
- Phagocytic cells are those that can engulf and ingest foreign particles, such as microbes and toxic substances. Endothelial cells line the blood vessels and can have phagocytic properties.

2. **Identifying the Options**:
- The options provided are:
- A) Monocyte
- B) Kuffer cells
- C) Lymphocytes
- D) Plasma cells

3. **Analyzing Each Option**:
- **Monocyte**: These are a type of white blood cell that can differentiate into macrophages when they enter tissues. However, they are not classified as endothelial cells.
- **Kuffer Cells**: These are specialized macrophages located in the liver. They are indeed phagocytic endothelial cells and play a crucial role in the immune response.
- **Lymphocytes**: These include B and T cells, which are primarily involved in adaptive immunity and do not have phagocytic properties.
- **Plasma Cells**: These are differentiated B cells that produce antibodies but do not have phagocytic functions.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Kuffer cells**, as they are the phagocytic endothelial cells.

### Final Answer:
**Kuffer cells** are the phagocytic endothelial cells.

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