Alveoli are tiny balloon-shaped structures. They are the smallest structures in the respiratory system. The alveoli are arranged in clusters throughout the lungs. They sit at the ends of the branches of your respiratory tree. This is the term used to describe the tree-like structure of passageways that brings air into the lungs.
The pulmonary alveolus is a sac roughly 0.2 to 0.5 mm in diameter. These alveoli are located at the ends of air passageways in the lungs. Sometimes, people compare alveoli structures to the appearance of a raspberry or a “bunch of grapes.”.
Function and Disorders of the Alveoli 1 Structure. Alveoli are tiny balloon shaped structures and are the smallest passageway in the respiratory system. 2 Function. Alveoli are the endpoint of the respiratory system which starts when we inhale air into the mouth or nose. 3 Related Conditions. … 4 Smoking. …