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, we need to analyze the options provided regarding the structure and volume of the heart chambers.

### Step-by-Step Solution:

1. **Understanding the Heart Structure**:
- The human heart consists of four chambers: two atria (upper chambers) and two ventricles (lower chambers).

2. **Evaluating Option A**:
- Option A states that the volume of both the atria is greater than the volume of both the ventricles.
- This is incorrect because the ventricles are larger than the atria.

3. **Evaluating Option B**:
- Option B claims that the volume of both the ventricles is greater than the volume of both the atria.
- This is correct as the ventricles are indeed larger and have a greater volume compared to the atria.

4. **Evaluating Option C**:
- Option C states that the volume of both the atria is equal to the volume of both the ventricles.
- This is incorrect since the atria are smaller in size compared to the ventricles.

5. **Evaluating Option D**:
- Option D claims that the ventricles are the upper chambers and the atria are the lower chambers.
- This is also incorrect; the atria are the upper chambers, while the ventricles are the lower chambers.

6. **Conclusion**:
- After evaluating all options, the only correct statement is Option B: "The volume of both the ventricles is greater than the volume of both the atria."

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