✅ Chemokines are part of the chemical defense.
Explanation:
- Chemokines are small signaling proteins (a type of cytokine).
- They guide immune cells like neutrophils and macrophages to the site of infection or injury by creating a chemical signal.
- Since they are not cells themselves and act by chemical signaling, they are classified under chemical defense.
Summary:
- Granulocyte → Cellular
- Chemokine → Chemical
- Skin/mucus → Physical
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