Back Of Skull Anatomy Labeled / Skeletal System Labeled Diagrams Of The Human Skeleton . In fact the intricate windy lines of these thin lines mark the adherence between the bones and the growth and closure of the cranial fontanelles. The remaining 7 bones in the head (6 auditory ossicles and 1 hyoid bone) do not articulate with the rest of the skull, and they are often referred to as accessory bones of the skull as a result. Hank grebe / getty images They evolved from the band discharge, and later moved into a style known as crossover. This series of skull models comprises 5 different aspects: The skull base is the inferior portion of the neurocranium. The bone that forms the back of the head and connects with the occipital condyles and foramen magnum — skeletal structures located on the underside of the skull, near the spine. The brain.the brain is almost entirely enclosed by the cerebral cranium with the. This is the uppermost of the cervical vertebrae. It is ring