In the heart of man, the mitral valve is attached to the papillary muscles by

Options

A. Bundle of His
B. Purkinje fibres
C. Columnae fibres
D. Chordae tendinae

Answer

To solve the question regarding the structure that attaches the mitral valve to the papillary muscles in the human heart, we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the structure that connects the mitral valve to the papillary muscles in the heart. The mitral valve is located between the left atrium and left ventricle, and the papillary muscles are found in the ventricles.

2. **Reviewing the Options**:
- **Option A: Bundle of His**: This structure conducts electrical impulses in the heart but does not connect the mitral valve to the papillary muscles. Therefore, this option is incorrect.
- **Option B: Purkinje Fibers**: These fibers are part of the conduction system of the heart that helps in the contraction of the ventricles but do not attach the mitral valve to the papillary muscles. Thus, this option is also incorrect.
- **Option C: Trabeculae Carneae**: These are muscular ridges in the ventricles but do not serve to connect the mitral valve to the papillary muscles. Hence, this option is incorrect as well.
- **Option D: Chordae Tendineae**: This is the correct answer. The chordae tendineae, also known as "heart strings," connect the mitral valve to the papillary muscles, helping to maintain the position and tension of the valve during the cardiac cycle.

3. **Conclusion**: After analyzing all options, the structure that attaches the mitral valve to the papillary muscles is the **chordae tendineae**.

### Final Answer:
The correct answer is **Option D: Chordae Tendineae**.