PSI Barbering Practice Exam

Which of the following bones joins all of the bones of the cranium together?

1. Sphenoid

2. Temporal

3. Occipital

4. Frontal

The correct answer is: Sphenoid

The sphenoid bone plays a crucial role in the structure of the cranium as it acts as a keystone, connecting and articulating with several other cranial bones. It has a unique shape and spans the width of the skull, forming part of the base of the skull and contributing to the sides and floor of the cranium. The sphenoid bone articulates with the frontal, parietal, temporal, occipital, and ethmoid bones, thereby effectively linking all of the cranial bones together. In contrast, the temporal, occipital, and frontal bones, while each contributing to the overall structure of the skull, do not connect with as many other bones as the sphenoid does. Therefore, it is the sphenoid bone that is central to maintaining the integrity and connection of the cranial structure.