ANATOMICAL TRAVELOGUE / SCIENCE PHOTO LIBRARY ANATOMICAL TRAVELOGUE / SCIENCE PHOTO LIBRARY
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Three-dimensional visualization of scanned human data of an anterior view of the female skull. The most complex part of the skeletal frame, the skull gives shape to the head and face, protects the brain, and houses the special sense organs. It is comprised of twenty-two separate bones, twenty-one of which are butted and unit-welded together with very adhesive joints. The mandible, the only free moving bone of the head is hinged, allowing the mouth to open and close. Sinuses, air-filled spaces in some of the bones surrounding the nasal cavity, lighten the skull's weight and act as an echo chamber, adding resonance to the voice. The size of the female skull is, on average, four fifths that of the male, and a woman's facial skeleton is generally less angular than that of a man.
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