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Summary
DescriptionCranial sinus and postcranial air sac systems in birds.svg
English: The respiratory system in a bird, showing lungs, abdominal air sac, anterior thoracic air sac, cervical air sac, clavicular air sa, humeral diverticulum of the clavicular air sac, paranasal sinus, posterior thoracic air sac, paratympanic sinus, and trachea.
Français : Schéma du système respiratoire d’un oiseau. Sinus craniaux et postcraniaux, systèmes de sac d’air chez les oiseaux. Tous les espaces pulmonaires vont par paire à l’exception du sac claviculaire, les poumons sont grisés.
Sereno PC, Martinez RN, Wilson JA, Varricchio DJ, Alcober OA, et al. (Sept 2008). "Evidence for Avian Intrathoracic Air Sacs in a New Predatory Dinosaur from Argentina". PLoS ONE 3(9): e3303.
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