Occipital bone - forms the back part and base of the skull.
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The brain is located within the skull and connected with other anatomical structures by the nerves and blood vessels going through many openings (foramina).The largest opening of the skull is oval-shaped and located at the skull base. The primary function of the skull is to provide protection for the brain and sensory organs connected with it. The human skull (Latin: cranium) is the skeleton of the head composed of 22 bones. Bones of the skull are joined together primarily by sutures.