Definition: alveoli -

Definition: alveoli - alveoli Alveoli The alveoli are the final branchings of the respiratory tree and act as the primary gas exchange units of the lung The gas-blood barrier between the alveoli Summary Alveoli are microscopic, balloon-like structures in the lungs that play an essential role in the respiratory system Over time, the

alveoli Alveoli are thin-walled, sac-like structures lined by a single layer of flattened squamous epithelial cells: type I pneumocytes This extremely thin nature of