The conchae are structures made of bone helping control the airflow into your nose, as well as clean and warm inhaled air. Concha bullosa happens when one of the conchae, or turbinates, inside ...

The image reveals the conchae inside the nasal cavity of a song sparrow, taken from a 3D reconstruction built on enhanced-contrast micro-CT scans. (Image credit: Eric Gulson and Mary Margaret Ferraro) ...

"The nasal conchae have vessels that are strongly supplied with blood. The nasal sprays have an effect on these," says Thomas Deitmer from the German Society of Oto-Rhino-Laryngology.