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Vertical section of the skull, showing the sinuses of the dura mater

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Vertical section of the skull, showing the sinuses of the dura mater.jpg Passage into trachea and esophagus; PharynxThumbnailsPlan of the foetal circulationPassage into trachea and esophagus; PharynxThumbnailsPlan of the foetal circulationPassage into trachea and esophagus; PharynxThumbnailsPlan of the foetal circulationPassage into trachea and esophagus; PharynxThumbnailsPlan of the foetal circulationPassage into trachea and esophagus; PharynxThumbnailsPlan of the foetal circulation

Vertical section of the skull