Which of the following bones is the only movable bone of the skull?

Rationale

Mandible is the only movable bone of the skull.

The mandible, or lower jawbone, is the only bone in the skull that is capable of movement, allowing for essential functions such as chewing and speaking. This distinct characteristic sets it apart from the other bones in the skull, which are rigidly fixed together by sutures.

A (Maxilla) YOUR ANSWER

The maxilla, or upper jawbone, is a fixed bone that forms the upper jaw and supports the upper teeth. It does not have any movable joints, as it is fused with other cranial bones, making it an immobile structure within the skull.

B (Zygomatic) YOUR ANSWER

The zygomatic bone, commonly known as the cheekbone, is also a fixed bone that contributes to the structure of the face. Like the maxilla, it is joined with other bones in the skull and does not exhibit any movement.

C (Lacrimal) YOUR ANSWER

The lacrimal bones are small, thin bones located in the inner corner of each eye socket. They are part of the facial skeleton and are immovable, serving as a component of the orbit rather than playing a role in jaw movement.

D (Mandible) CORRECT

The mandible is unique among the skull bones as it is connected to the skull via the temporomandibular joint, allowing it to move. This mobility enables the mandible to perform functions essential for eating and communication, distinguishing it from the other cranial bones.

Conclusion

The mandible stands out as the only movable bone of the skull, enabling vital functions such as mastication and articulation. In contrast, the maxilla, zygomatic, and lacrimal bones are all fixed structures that do not allow for movement. Understanding this distinction is crucial in fields such as anatomy and dentistry, where the functionality of the jaw is essential for patient care.

Which of the following bones is the only movable bone of the skull?

Mandible is the only movable bone of the skull.

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