In birds, air sacs allow Question 5 options: unidirectional airflow bidirectional air flow gas exchange aerobic cellular respiration
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Air sacs are specialized structures that help in respiration by allowing for a continuous flow of air through the lungs. Show more…
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The bird respiratory system allows for efficient gas exchange because air sacs allows the recycling of the air for more O2 extraction birds have much greater concentrations of carbaminohemoglobin air sacs function as additional exchange surfaces birds have unusually large lungs the parabronchi air flow runs opposite the blood flow
Maitreya E.
Which statement about the gas exchange system of birds is not true? a. Respiratory gases are not exchanged in the air sacs. b. A bird can achieve more complete exchange of $\mathrm{O}_{2}$ from air to blood than humans can. c. Air passes through birds' lungs in only one direction. d. The gas exchange surfaces in bird lungs are the parabronchi. e. A breath of air remains in the system for two breathing cycles.
Which statement about the gas exchange system of birds is not true? a. Respiratory gases are not exchanged in the air sacs. $b$. It can achieve more complete exchange of $\mathrm{O}_{2}$ from air to blood than the human gas exchange system can. c. Air passes through birds' lungs in only one direction. $d .$ The gas exchange surfaces in bird lungs are the alveoli. $e .$ A breath of air remains in the system for two breathing cycles.
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