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Figure 7. Endogenous surfactant delivery. Diagram of a type II pneumocyte demonstrates migration of lamellar bodies (arrow) from the nucleus to the apical cell surface, where surfactant (in pink) is released into the alveolus by exocytosis. (Diagram by Aletta Ann Frazier, MD, Department of Radiologic Pathology, Amred Forces Institute of Pathology.)
