The nasal cavity is the first part of the respiratory system where air enters to begin the breathing process. The nasal conchae are so called for their shell-shaped structure. The conchae form the lateral walls of the nasal cavity.
Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.