title: Mechanisms of gas exchange in bird lungs.
mesh_terms: D000400:Air Sacs / Q000033:anatomy & histology / Q000502:physiology; D000818:Animals; D001717:Birds / Q000033:anatomy & histology / Q000502:physiology*; D001980:Bronchi / Q000033:anatomy & histology / Q000502:physiology; D002245:Carbon Dioxide / Q000097:blood; D008168:Lung / Q000033:anatomy & histology / Q000502:physiology*; D008954:Models, Biological; D010100:Oxygen / Q000097:blood / Q000502:physiology*; D012119:Respiration
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen