The air will flow from the posterior air sacs (posterior thoracic and abdominal air sacs) to the anterior air sacs (interclavicular, cervical and thoracic anterior air sacs), all while having to breathe in and breathe out. Normally, when a bird breath Half the air passes through the posterior air sacs and the remaining half to pass into the lungs and air sacs anterior to all body air bags to expand, and when there is wind socks exhale shrinkage causes the anterior air sacs from the air were driven out through the air in the trachea, while the posterior air sacs will flow to the lungs, and was driven out to breath because the air flows through the inflow of air purifiers that work one way, and not in combination with the Air Purifier. Make 1 more time efficient breathing mammals breathe. In the lungs of birds do not have alveoli as in mammals, but there is a structure called the parabronchi instead with plenty of air vesicles, called atria, and the area itself with gas exchange occurs.
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