| Namespace | MPheno.ontology | Obsolete | false |
| description | fewer than normal numbers of the tubuloacinar seromucous glands which are principally located in the submucosa of the trachea, open into the tracheal lumen through short ducts, and secrete mucus, lysozyme, defensins, and other agents that help protect the lungs from particles and infectious agents; in the mouse, they are restricted to the upper trachea, more specifically to the regions between the first few cartilage rings, with the precise distribution depending on genetic background |
