White blood cells are classified into _______ and _______

Explanation

**Step-by-Step Solution:**

1. **Understanding White Blood Cells**: White blood cells (WBCs), also known as leukocytes, are an essential part of the immune system. They help the body fight infections and other diseases.

2. **Classification of White Blood Cells**: White blood cells are classified into two main categories based on the presence or absence of granules in their cytoplasm.

3. **Granulocytes**: This category includes white blood cells that have a granular cytoplasm. Granulocytes are further divided into three types: neutrophils, eosinophils, and basophils. These cells play a crucial role in the immune response.

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