Which cellular structures act as: cell circulatory system, protein factories, power houses, kitchens of the cell, ciliated centriole and disposal units.

Explanation

### Step-by-Step Text Solution:

1. **Cell Circulatory System**:
- The structure that acts as the cell's circulatory system is the **Endoplasmic Reticulum (ER)**.
- The ER is responsible for the transportation of proteins and other molecules throughout the cell, ensuring that they reach their necessary destinations.

2. **Protein Factories**:
- The cellular structure known as the **Ribosomes** serves as the protein factories of the cell.
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