has part has part has_part material entity material entity anatomical entity anatomical entity proximo-distal subdivision of respiratory tract pair of lungs lower respiratory tract http://upload.wikimedia.org/wikipedia/commons/9/9f/Illu_conducting_passages.svg http://upload.wikimedia.org/wikipedia/commons/c/c3/Illu_conducting_passages.jpg uberon UBERON:0001558 FMA:45662 OpenCyc:Mx4rQRqjUgAKEdyHxgDggVfs8g Wikipedia:Lower_respiratory_tract MA:0000435 VHOG:0000382 lower respiratory system EHDAA2:0001036 SCTID:281488008 The segment of the respiratory tract that starts proximally with the trachea and includes all distal structures including the lungs[WP,modified]. EMAPA:16738