Source:http://linkedlifedata.com/resource/umls/id/C0006255
MSH: The larger air passages of the lungs arising from the terminal bifurcation of the TRACHEA. They include the largest two primary bronchi which branch out into secondary bronchi, and tertiary bronchi which extend into BRONCHIOLES and PULMONARY ALVEOLI.,CSP: larger air passages of the lungs arising from the terminal bifurcation of the trachea.,NCI: The large air passages that lead from the trachea (windpipe) to the lungs.,NCI: Tubular structure in continuation with the trachea, serving as air passage. It terminates in the lung (terminal bronchiole). (NCI),NCI: Tubular structure in continuation with the trachea, serving as air passage. It terminates in the lung (terminal bronchiole).