Which part of ulna is called elbow?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which part of the ulna is referred to as the elbow.

2. **Identifying the Ulna**: The ulna is one of the two long bones in the forearm, the other being the radius. It extends from the elbow to the wrist.

3. **Recognizing the Ends of the Ulna**: The ulna has two ends:
- **Distal End**: This is the narrower end that is closer to the wrist.
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