human_reference_atlas part of Homo sapiens organ part respiratory bronchiole alveolus of lung https://upload.wikimedia.org/wikipedia/commons/4/46/Alveolus_diagram.svg CALOHA:TS-0031 UBERON:0002299 respiratory alveolus alveolus of lung on respiratory bronchiole SCTID:361364000 BTO:0000060 alveolus of lung alveolus pulmonis alveoli GAID:349 alveolus FMA:7318 Spherical outcropping of the respiratory bronchioles and primary site of gas exchange with the blood. Alveoli are particular to mammalian lungs. Different structures are involved in gas exchange in other vertebrates[WP]. EFO:0001985 lung alveolus EV:0100043 uberon EMAPA:32682 MA:0000420 alveolus of lung VHOG:0001445 alveolus of lung on respiratory bronchiole alveolus pulmonis AS respiratory alveoli Wikipedia:Pulmonary_alveolus MESH:D011650 pulmonary alveolus pulmonary acinus secondary pulmonary lobule bronchopulmonary segment