have unidirectional flow of air through the bronchi. Similar to humans, birds have a two-step breathin ough the beak and then out through the beak). Trachea B Syrinx A Ventrobronchi Only fresh air Primary bronchus C Intrapulmonary bronchus B position in the diagram, sort them into the appropriate group. Only 'spent' air Bronchi airflow direction Dorsobronchi Laterobronchus D A mix of air D

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