K H FUNG / SCIENCE PHOTO LIBRARY K H FUNG / SCIENCE PHOTO LIBRARY
Base of the skull and head. Coloured 3D computed tomography (CT) scan of the base of a human skull (yellow and red), seen from below, with the overlying tissues and the paranasal sinuses and the mastoid air cells, all shown in blue. The front of the skull is at top. Visible skull structures include the teeth, the zygomatic arches (upper left and upper right), and the holes (foramina) at the base of the skull, including the foramen magnum (lower centre) through which the brain's medulla oblongata passes, giving rise to the spinal cord. For this image without the air spaces and facial tissues, see image C037/4659.
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