Uberon definition : 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].;
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].