Phagocytes of innate immunity are

Options

A. Neutrophils
B. Macrophages
C. Monocytes
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding Phagocytes**:
- Phagocytes are specialized cells in the immune system that protect the body by engulfing and destroying foreign materials such as bacteria, fungi, and other pathogens.

2. **Identifying Types of Phagocytes**:
- The main types of phagocytes involved in innate immunity include:
- **Neutrophils**: These are the most abundant type of white blood cells and are the first responders to sites of infection. They contain granules that help in killing foreign materials.
- **Macrophages**: These cells are derived from monocytes and can engulf and digest pathogens. They can circulate in the bloodstream and also reside in tissues.
- **Monocytes**: These are large white blood cells that circulate in the blood and can differentiate into macrophages or dendritic cells when they enter tissues. They also play a role in tissue healing.

3. **Conclusion**:
- Since all three types of cells (neutrophils, macrophages, and monocytes) are phagocytes and play a role in innate immunity, the correct answer to the question is "all of the above."

### Final Answer:
Phagocytes of innate immunity are **all of the above**: neutrophils, macrophages, and monocytes.

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