Give the function of monocytes.

Explanation

**Step-by-Step Solution:**

1. **Understanding White Blood Cells (WBCs):**
- White blood cells are crucial components of the immune system. They are primarily responsible for defending the body against infections and foreign invaders.

2. **Classification of WBCs:**
- WBCs are categorized into two main groups:
- **Granulocytes:** These cells have granules in their cytoplasm and include neutrophils, eosinophils, and basophils.
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