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The sructure of bone of cerebrall skull. The structure of temporal bone its canals. The internal base of the skull, its canals. The internal base of the skull, fosses, foramen

The human skull consists of about 22 to 30 single bones which are mostly connected together by ossified joints, so called sutures. The skull is divided into the braincase (cerebral cranium) and the face (visceral cranium). Its main task is the protection of the most important organ in the human body: the brain. The brain is almost entirely enclosed by the cerebral cranium with the exception of the foramen magnum and other foramina at the skull base which serve as entry and exit point for blood vessels and cranial nerves.

The braincase consists of the skullcap (calvarium) and the skull base. The skull cap is made up of the pairs of parietal bones and parts of the frontal bone as well as the occipital bone. The most important sutures in the human skull are: the coronal suture (between the frontal and parietal bone), the sagittal suture (dividing both the parietal bones) and the lambdoidal suture (running horizontally between the occipital bone and both parietal bones). These are the three most significant of all 33 sutures which are formed by the human skull bones.

The skull base is the caudal boundary of the cerebral cranium. Looking at it from the inside it can be subdivided into the anterior, middle and posterior cranial fossae. The skull base comprises parts of the frontal, ethmoid, sphenoid, occipital and temporal bones.

The face is referred to as all skull bones fronto-caudally connected to the cerebral cranium. Prominent representatives are the maxilla (upper jaw) and the mandible (lower jaw). The orbita and the nasal cavity are formed by the zygomatic, nasal, palatine, lacrimal bones, the vomer and the inferior nasal concha (lower turbinate).

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