Which one of the following is a sesamoid bone

Options

A. Pelvis
B. patella
C. pterygoid
D. Pectoral girdle

Answer

**Step-by-Step Solution:**

1. **Understand the Definition of Sesamoid Bones**: Sesamoid bones are small, rounded bones that are embedded within tendons. They develop in response to mechanical stress and serve to protect tendons and improve their mechanical function.

2. **Identify the Options Given**: The options provided are:
- Pelvis
- Patella
- Pterygoid
- Pectoral girdle

3. **Analyze Each Option**:
- **Pelvis**: This is a large bony structure that supports the spine and is not a sesamoid bone.
- **Patella**: Also known as the kneecap, it is the largest sesamoid bone in the human body and is embedded in the tendon of the quadriceps muscle.
- **Pterygoid**: This refers to a pair of bones in the skull, which are not sesamoid bones.
- **Pectoral Girdle**: This is a structure that connects the arm to the body trunk and does not contain sesamoid bones.

4. **Conclusion**: Among the options, the patella is the only sesamoid bone.

5. **Final Answer**: The sesamoid bone from the given options is the **Patella**.

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