Figure 17. Low and high magnification of histological sections of the intra-lung structure (A), visceral pleura (B), alveolar lining (C and D).

Study sites: A, alveoli; AC, alveolar capillary; AD, alveolar duct; AS, alveolar sac; B, bronchiole; BV, blood vessel; FC, fibrous connective tissue; IA, interalveolar septum; P1, pneumocyte type I; P2, pneumocyte type II; RB, respiratory bronchiole; SB, secondary bronchus; TB, tertiary bronchus; VP, visceral pleura. Hematoxylin and eosin staining.