Base of the skull (upper surface)
This image details the foramina of the skull.
This image details the location of foramina in the skull. Key foramina shown here include: the supraorbital foramen, optic foramen, foramen magnum, foramina of cribriform plate, foramen rotundum.
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"The location of foramina in the skull. ."
http://upload.wikimedia.org/wikipedia/commons/8/81/Gray193.png
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