Skull

The skull is a bony structure in the head of many animals that supports the structures of the face and forms a cavity for the brain.

The skull is composed of two parts: the cranium and the mandible. A skull without a mandible is only a cranium. Animals that have skulls are called craniates. The skull is a part of the skeleton.

Functions of the skull include protection of the brain, fixing the distance between the eyes to allow stereoscopic vision, and fixing the position of the ears to help the brain use auditory cues to judge direction and distance of sounds. In some animals, the skull also has a defensive function (e.g. horned ungulates); the frontal bone is where horns are mounted.

The English word "skull" is probably derived from Old Norse "skalli" meaning bald, while the Latin word cranium comes from the Greek root κρανίον (kranion).

The skull is made of flat bones. The human skull is usually 7 mm thick

Read more about Skull:  Fish Skulls, Tetrapod Skulls, Fenestrae, Human Skull, Bones, Terminology, Gallery

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Famous quotes containing the word skull:

    Panting, begging I clutched childlike, clutched to the hot sides of
    death.
    Now I am dry bones and my face a stony skull staring in yellow
    surprise at the sun. . . .
    Richard Wright (1808–1860)

    No throne exists that has a right to exist, and no symbol of it, flying from any flagstaff, is righteously entitled to wear any device but the skull and crossbones of that kindred industry which differs from royalty only businesswise-merely as retail differs from wholesale.
    Mark Twain [Samuel Langhorne Clemens] (1835–1910)

    Locked in each human skull is a little world all its own.
    Robert Tusker, and Michael Curtiz. Dr. Xavier (Lionel Atwill)