Give two unique features of cardiac muscles.

Explanation

### Step-by-Step Solution:

1. **Introduction to Muscle Types**:
- There are three types of muscles in the human body: smooth muscle, skeletal muscle, and cardiac muscle. Understanding these types is essential to differentiate the unique features of cardiac muscle.

2. **Comparison with Other Muscles**:
- Cardiac muscle shares some characteristics with both skeletal and smooth muscles. For instance, both cardiac and skeletal muscles are cylindrical in shape, but cardiac muscles are unique because they are branched.

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