Name five types of leucocytes of human blood.

Explanation

### Step-by-Step Solution:

1. **Understanding Leukocytes**:
- Leukocytes, commonly known as white blood cells, are a crucial component of the immune system in humans. They help the body fight infections and other diseases.

2. **Types of Leukocytes**:
- There are five main types of leukocytes found in human blood. These can be categorized into two groups: granulocytes and agranulocytes.

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