GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Skull. Coloured X-ray of a human skull seen from the side. The face is at right. At upper left is the large cranium which encloses the brain. The jaw (lower right) houses numerous teeth. Some of the teeth have had fillings (yellow) as a result of tooth decay (dental caries). All the bones of the skull, apart from the mandible (jaw-bone) and facial bones, are fused together to form a solid structure that protects the brain.
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