In human heart, maximum pressure in normal functioning heart will develop during systole at :-

Options

A. Right atrium
B. Left atrium
C. Right ventricle
D. Left ventricle

Answer

To determine where the maximum pressure in a normal functioning human heart develops during systole, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Systole**:
- Systole is the phase of the cardiac cycle when the heart muscle contracts. This phase is crucial for pumping blood out of the heart.

2. **Identifying the Phases of Systole**:
- During systole, particularly during ventricular systole, the ventricles contract to pump blood. This phase can be divided into two parts: isovolumetric contraction and ventricular ejection.

3. **Isovolumetric Contraction**:
- Initially, during isovolumetric contraction, the ventricles contract, and pressure builds up. However, during this phase, the volume of blood in the ventricles remains constant because the valves are closed.

4. **Ventricular Ejection**:
- As the contraction continues, the pressure in the ventricles increases until it is sufficient to open the semilunar valves (pulmonary and aortic valves). This allows blood to be ejected into the pulmonary artery (from the right ventricle) and the aorta (from the left ventricle).

5. **Maximum Pressure Development**:
- The left ventricle generates the highest pressure during systole because it has to pump blood throughout the entire body, overcoming systemic vascular resistance. The right ventricle pumps blood to the lungs, which requires less pressure.

6. **Conclusion**:
- Therefore, the maximum pressure in a normal functioning heart during systole occurs in the left ventricle.

### Final Answer:
The maximum pressure in a normal functioning heart during systole develops at the **left ventricle**.

---