Source:http://linkedlifedata.com/resource/umls/id/C0006270
CSP: smaller airways in the lungs; minute subdivisions of the bronchi that terminate in the alveoli (oxygen exchange apparatus).,MSH: The small airways branching off the TERTIARY BRONCHI. Terminal bronchioles lead into several orders of respiratory bronchioles which in turn lead into alveolar ducts and then into PULMONARY ALVEOLI.,NCI: A tiny branch of air tubes in the lungs.