Preterm Infants Have Narrowed Upper Airways (image) Children's National Health System Share Print E-Mail Caption The airway structures of interest to the Children's National research team included the nasopharynx (labeled red), oropharynx (labeled purple), hypopharynx (labeled green), adenoids (labeled yellow) and tonsils (labeled blue). The team displayed the volumetric imaging in three perpendicular planes and a three-dimensional model. Credit Credit: A. Smitthimedhin, et al, Clinical Imaging. Usage Restrictions Please use this credit. Credit: A. Smitthimedhin, et al, Clinical Imaging. Share Print E-Mail 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.