The joints between the bones of the skull are

  • A. freely movable synovial joints
  • B. slightly movable cartilaginous joints
  • C. immovable fibrous joints called sutures
  • D. ball and socket joints

Explanation

Sutures interlock the skull bones with fibrous tissue, locking the case that protects the brain. Free movement here would be dangerous, which is why the only movable skull bone is the mandible.

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