human_reference_atlas part of Homo sapiens respiratory tract proximo-distal subdivision of respiratory tract upper 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 upper respiratory tract Some specify that the glottis (vocal cords) is the defining line between the upper and lower respiratory tracts;[2] yet even others make the line at the cricoid cartilage. The FMA includes nose, nasopharynx, oropharynx and larynx[WP] EMAPA:17669 UBERON:0001557 upper respiratory tract The segment of the respiratory tract that starts proximally with the nose and ends distally with the cricoid cartilage, before continuing to the trachea. MA:0000442 FMA:45661 uberon AS SCTID:361381009 VHOG:0000406 Wikipedia:Upper_respiratory_tract EHDAA2:0002136 lower respiratory tract