The rotator movement of the head from side to side over the vertebra is due to the :

Options

A. Gliding joint
B. Fibrous joint
C. Ball and socket joint
D. Pivot joint

Answer

### Step-by-Step Text Solution:

1. **Understanding the Skeletal System**: The human skeletal system is composed of 206 bones and some cartilage. It is divided into two main parts: the axial skeleton and the appendicular skeleton.

2. **Components of the Axial Skeleton**: The axial skeleton consists of 80 bones. It includes the skull, vertebral column, sternum, and ribs.

3. **Skull Structure**: The skull is made up of two sets of bones: the cranial bones and the facial bones.

4. **Rotational Movement of the Head**: The rotator movement of the head from side to side occurs at the vertebrae. This movement is primarily facilitated by the structure of the axial skeleton.

5. **Conclusion**: Therefore, the rotator movement of the head from side to side over the vertebra is due to the axial skeleton.

### Final Answer:
The rotator movement of the head from side to side over the vertebra is due to the **axial skeleton**.

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