All of the following structures in the human skeleton are made up of a single bone except

Options

A. Lower jaw
B. Hyoid
C. Upper jaw
D. Zygomatic arch

Answer

To solve the question "All of the following structures in the human skeleton are made up of a single bone except," we need to identify which of the given options is not made up of a single bone. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the Structures
First, we need to list the structures mentioned in the question. Common structures in the human skeleton that are made up of a single bone include:
- Lower jaw (Mandible)
- Upper jaw (Maxilla)
- Hyoid bone

### Step 2: Analyze Each Structure
Next, we analyze each structure to determine if it is made up of a single bone:
- **Lower Jaw (Mandible)**: This is a single bone structure.
- **Upper Jaw (Maxilla)**: This is also a single bone structure.
- **Hyoid Bone**: This is a single bone located in the neck.

### Step 3: Identify the Exception
Now, we need to find the structure that is not made up of a single bone. One common structure that is often confused is the **Zygomatic Arch**. The zygomatic arch is formed by two bones:
- Zygomatic bone
- Temporal bone

### Step 4: Conclusion
Since the zygomatic arch is made up of two bones, it is the exception in this list. Therefore, the correct answer to the question is that the structure made up of more than one bone is the **Zygomatic Arch**.

### Final Answer
The correct option is **Zygomatic Arch**.

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