Maxillary Sinuses (image) University of Iowa Caption The maxillary sinuses, those pouches on either side of the human nose, change their size depending on the shape of the nasal cavity, according to a research team led by the University of Iowa. The study shows why the maxillary sinuses in African-origin faces (shown at right) differ from those of European origin. Credit Nathan Holton, University of Iowa Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.