Patella bone is a cartilaginous bone/sesamoid bone.

Explanation

To determine whether the patella bone is a cartilaginous bone or a sesamoid bone, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Patella Bone**: The patella, commonly known as the kneecap, is a small, flat, triangular bone located in front of the knee joint.

**Hint**: Remember that the patella is often referred to as the kneecap.

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