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Alveolar sack

Alveolar sack [sacculus alveolaris – PNA (The anatomic nomenclature Parisian), BNA (The anatomic nomenclature Basel), JNA (The anatomic nomenclature Yenskaya), LNH (The Leningrad histologic nomenclature)] – one of structural components of a pulmonary acinus which is the "blind" termination of the alveolar course. Walls of an alveolar sack are formed by association of numerous alveoluses.

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