Which of the following is correct about human heart ?

Options

A. The volume of both atria `gt` the volume of both ventricles
B. The volume of both ventricles `gt` the volume of both atria
C. The volume of both atria = the volume of both ventricles
D. Ventricles are upper chambers and atria are lower chambers inout heart

Answer

To determine which statement is correct about the human heart, let's analyze the structure and function of the heart step by step.

### Step-by-Step Solution:

1. **Understanding the Structure of the Heart**:
- The human heart consists of four chambers: two atria (upper chambers) and two ventricles (lower chambers).
- The right atrium receives deoxygenated blood from the body, while the left atrium receives oxygenated blood from the lungs.

2. **Function of the Heart**:
- The primary function of the heart is to pump blood throughout the body.
- The ventricles are responsible for pumping blood out of the heart: the right ventricle pumps deoxygenated blood to the lungs, and the left ventricle pumps oxygenated blood to the rest of the body.

3. **Comparing the Volumes of Atria and Ventricles**:
- The atria are smaller in size compared to the ventricles. This is because the ventricles need to generate enough pressure to pump blood out of the heart, which requires a larger volume.
- Therefore, the volume of both ventricles combined is greater than the volume of both atria combined.

4. **Evaluating the Options**:
- **Option 1**: The volume of both the atria is greater than the volume of both the ventricles. (Incorrect)
- **Option 2**: The volume of both the ventricles is greater than the volume of both the atria. (Correct)
- **Option 3**: The volume of both atria and the ventricles are equal. (Incorrect)
- **Option 4**: The ventricles are the upper chamber whereas the atria are the lower chamber of the heart. (Incorrect)

5. **Conclusion**:
- The correct statement about the human heart is that the volume of both the ventricles is greater than the volume of both the atria.

### Final Answer:
The correct option is: **The volume of both the ventricles is greater than the volume of both the atria.**

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