Why is movement necessary in WBC and macrophages ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Role of WBCs and Macrophages:**
- White blood cells (WBCs) and macrophages are crucial components of the immune system. Their primary role is to defend the body against pathogens, which are disease-causing microorganisms.

2. **Importance of Movement:**
- Movement is essential for WBCs and macrophages because they need to travel to various parts of the body to identify and eliminate pathogens. This mobility allows them to reach infected areas quickly and efficiently.

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