Fill in the following blanks with suitable words :
Artia and ventricles are the chambers of the …....................

Answer

**Step-by-Step Solution:**

1. **Identify the Key Terms**: The question asks about "atria" and "ventricles," which are specific terms related to the anatomy of the heart.

2. **Understand the Function**: Atria and ventricles are chambers that play a crucial role in the circulatory system by receiving and pumping blood.

3. **Recall the Structure of the Heart**: The heart is the main organ of the circulatory system and consists of four chambers: two atria and two ventricles.

4. **Fill in the Blank**: Based on the understanding that atria and ventricles are parts of the heart, the blank can be filled with the word "heart."

5. **Final Answer**: Atria and ventricles are the chambers of the **heart**.

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