Mitochondria in cardiac muscles `:-`

Options

A. More than other muscles fibres
B. Less than other muscles fibres
C. Equal than other muscles fibres
D. None

Answer

### Step-by-Step Solution:

1. **Understanding Cardiac Muscles**:
- Cardiac muscles are specialized muscles found in the heart, specifically in the myocardium. They are striated, meaning they have a banded appearance due to the arrangement of muscle fibers.

2. **Role of Mitochondria**:
- Mitochondria are known as the powerhouse of the cell, responsible for energy production. In cardiac muscles, mitochondria are referred to as "sarcosomes."

3. **Fatigue Resistance**:
- Cardiac muscles are highly resistant to fatigue. This characteristic is essential because the heart needs to pump continuously without tiring.

4. **Mitochondrial Density**:
- Cardiac muscles contain a higher number of mitochondria (sarcosomes) compared to other muscle fibers. This increased number is crucial for meeting the high energy demands of the heart.

5. **Comparison with Other Muscle Fibers**:
- When comparing cardiac muscles with other types of muscle fibers (like skeletal muscles), cardiac muscles have more mitochondria. This is necessary for their function and endurance.

6. **Conclusion**:
- Based on the information, the correct answer to the question regarding the number of mitochondria in cardiac muscles is that they are more than in other muscle fibers.

### Final Answer:
- **The number of mitochondria in cardiac muscles is more than in other muscle fibers.**

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