title: Structure and gas-flow pattern in the avian respiratory system.
mesh_terms: D000818:Animals; D001717:Birds / Q000033:anatomy & histology / Q000502:physiology*; D001784:Blood Gas Analysis; D001980:Bronchi / Q000033:anatomy & histology / Q000502:physiology; D008168:Lung / Q000033:anatomy & histology / Q000502:physiology*; D012143:Respiratory Physiological Phenomena; D012137:Respiratory System / Q000033:anatomy & histology