[Review of the organogenesis of the respiratory system (excluding the pulmonary parenchyma)].

A simplified panorama of the different formation phases of the upper respiratory system (larynx, trachea, main bronchi) is presented. Chronologic evolution of organogenesis in embryologic phase and fetal phase is emphasized. Post-natal growing is also described. A classification of malformations of the upper respiratory system is done, based on topographic data. The mechanism of genesis of the malformations remains of hypothetical value.