The bones that form the largest portion of the side of the head are the bone and the bone.

The bones that form the largest portion of the side of the head are the parietal bone and the temporal bone.

The parietal bones are two large bones located on the top and sides of the skull. They meet at the midline of the skull in an area called the sagittal suture and connect with the frontal bone at the coronal suture. The parietal bones are vital as they contribute to the protection of the brain and form the sides and roof of the cranial cavity.

On the other hand, the temporal bones are located underneath the parietal bones, closer to the ears. They are more complex and contain structures critical to hearing and balance, such as the auditory canal and the inner ear. Together, these two bones form a significant portion of the lateral aspect of the skull, providing both structural integrity and protection for the brain while also playing a role in the functional anatomy of the jaw and ear.