PAUL RAPSON / SCIENCE PHOTO LIBRARY PAUL RAPSON / SCIENCE PHOTO LIBRARY
Human skull. Top view of the interior of a sectioned human skull. The front of the skull is at top. At the centre of the base of the skull is the foramen magnum, the hole through which the brainstem passes to meet the spinal cord. The wings of the sphenoid bone form the base of the front of the skull, while at the front centre is the highly-perforated cribriform plate of the ethmoid bone.
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