Fill in the blank:
The centriole forms spindle during cell division in ........... cells.

Explanation

To answer the question, we need to fill in the blank: "The centriole forms spindle during cell division in ........... cells."

### Step-by-Step Solution:

1. **Understanding Centrioles**:
- Centrioles are paired, barrel-shaped organelles found in the cytoplasm of cells. They are cylindrical structures made primarily of a protein called tubulin.

2. **Role of Centrioles in Cell Division**:
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