Why are granulocytes called polymorphonuclear corpuscles ?

Explanation

### Step-by-Step Solution:

1. **Understanding Granulocytes**: Granulocytes are a type of white blood cell (WBC) that play a crucial role in the immune system, specifically in providing defense against infections.

2. **Innate Immunity**: These cells are part of the innate immune system, which is the body's first line of defense and is present from birth.

3. **Structure of Granulocytes**: Granulocytes contain granules in their cytoplasm, which are small particles that help in their function.

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