bird respiratory system in lateral view. .

bird respiratory system lateral vector avian abdominal air sac anatomical anatomy muscles anterior biology bronchi bronchus cervical clavicular education extraclavicular humeral larynx lung lungs organs pigeon posterior science structure syrinx trachea zoology animal birds highly efficient adapted meet high metabolic demands continuous flow oxygen providing constant supply inhalation exhalation additionally compact densely packed millions tiny capillaries enabling gas exchange ensuring optimal uptake flight high-energy activities