Which among the following is correct during each cardiac cycle ?

Options

A. The volume·of blood pumped out by the Rt and Lt ventricles is same
B. The volume of blood pumped out by the Rt and Lt ventricles is different
C. The volume of blood received by each atrium is different
D. The volume of blood received by the aorta and pulmonary artery is different

Explanation

To solve the question "Which among the following is correct during each cardiac cycle?", we need to analyze each option provided and understand the cardiac cycle's mechanics.

### Step-by-Step Solution:

1. **Understanding the Cardiac Cycle**:
- The cardiac cycle consists of a sequence of events that occur during one heartbeat. It includes alternating contractions and relaxations of the heart's chambers (atria and ventricles).

2. **Analyzing Option A**:
- **Statement**: The volume of blood pumped out by the right and left ventricle is the same.
- **Explanation**: In a healthy heart, both ventricles pump the same volume of blood. The right ventricle pumps blood into the pulmonary circulation, while the left ventricle pumps blood into systemic circulation. Since both circuits are in equilibrium, the volume of blood pumped by each ventricle is equal.
- **Conclusion**: This statement is correct.

3. **Analyzing Option B**:
- **Statement**: The volume of blood pumped out by the right and left ventricle is different.
- **Explanation**: This statement contradicts the basic physiology of the heart. In a healthy individual, the volumes are equal; thus, this statement is incorrect.

4. **Analyzing Option C**:
- **Statement**: The volume of blood received by each atrium is different.
- **Explanation**: In a healthy heart, the volume of blood received by the right atrium (from the body) and the left atrium (from the lungs) is also equal, as the output from the right ventricle matches the input to the left atrium and vice versa. Therefore, this statement is incorrect.

5. **Analyzing Option D**:
- **Statement**: The volume of blood received by the aorta and pulmonary artery is different.
- **Explanation**: The aorta and pulmonary artery receive blood from the left and right ventricles, respectively. Since both ventricles pump the same volume of blood, this statement is also incorrect.

6. **Final Conclusion**:
- Based on the analysis, the correct answer is **Option A**: The volume of blood pumped out by the right and left ventricle is the same.

### Summary:
The correct answer to the question is **Option A**. During each cardiac cycle, the volume of blood pumped out by the right and left ventricles is the same.