title: [The postnatal evolution of the extra- and intrapulmonary bronchopulmonary airways].
abstract: The follow-up of the bronchoalveolar branch development was made by the help of radiographs performed on pulmons taken in the first 4 post-natal weeks and injected with barium. The new environmental circumstances of life for the new-born can influence this development. If at birth the air-ways are mostly existent, the alveolar network multiplies very much after birth, together with the more pronounced sustaining of the alveolocapillary structures. The prematures have primitive alveolar bags, but they can accomplish with them the gas exchange, even if in very difficult circumstances. But the tightening of the peripheral air-ways support the frequency of the peripheral bronchial pathological events during the early years of life, the failure of collateral venticulation also contributing to this. The parallel development of the vascular elements, particularly, besides the other parenchymal structures, has a special role in this respiratory components.
authors.affiliation: Disciplina de Anatomie, Facultatea de Farmacie, Universitatea de Medicină şi Farmacie Gr. T. Popa, Iaşi.
authors.forename: M D
authors.initials: MD
authors.lastname: Scutaru
mesh_terms: D000375:Aging; D001980:Bronchi / Q000098:blood supply / Q000254:growth & development* / Q000294:innervation; D001995:Bronchography; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008168:Lung / Q000098:blood supply / Q000000981:diagnostic imaging / Q000254:growth & development* / Q000294:innervation