Gas exchange in the lungs occurs in millions of small air sacs; in mammals and reptiles these are called alveoli, and in birds they are known as atria.
Amutti n adu daɣ taruten itaj s milyon tan daɣ sakkoch tan madroynen n adu; daɣ ifafan d imudaran s ismawan nasan alveoli tolas daɣ igdad aqqalan atria