Which among the following is correct during each cardiac cycle ?

Options

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

Explanation

To solve the question regarding which statement is correct during each cardiac cycle, we can break down the information about the cardiac cycle and analyze the provided statements step by step.

### Step-by-Step Solution:

1. **Understanding the Cardiac Cycle**:
- The cardiac cycle consists of all the events that occur during one heartbeat. It includes phases of contraction and relaxation of the heart chambers.

2. **Phases of the Cardiac Cycle**:
- The cardiac cycle is divided into three main phases:
- **Atrial Systole**: This is the contraction of the atria, lasting approximately 0.1 seconds.
- **Ventricular Systole**: This is the contraction of the ventricles, lasting about 0.3 seconds.
- **Joint Diastole**: This phase involves the relaxation of both the atria and ventricles, lasting around 0.4 seconds.

3. **Analyzing the Statements**:
- **Statement A**: The volume of blood pumped out by the right and left ventricles is the same.
- This statement is correct because both ventricles pump an equal volume of blood to maintain balance in the circulatory system.

- **Statement B**: The volume of blood pumped out by the right and left ventricles is different.
- This statement is incorrect as we established that the volumes are the same.

- **Statement C**: The volume of blood received by each atrium is different.
- This statement is incorrect because both atria receive equal volumes of blood from the body and lungs, respectively.

- **Statement D**: The volume of blood received by the aorta and pulmonary artery is different.
- This statement is also incorrect as both the aorta and pulmonary artery receive equal volumes of blood from the left and right ventricles, respectively.

4. **Conclusion**:
- The only correct statement is **Statement A**, which states that the volume of blood pumped out by the right and left ventricles is the same.

### Final Answer:
The correct statement during each cardiac cycle is: **The volume of blood pumped out by the right and left ventricles is the same.**

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