Figure 1.
Picture of air sacs and lungs in a bird, lateral view
(From Animal Physiology, M. Stewart, 1991)
Figure 2.
Picture of air sacs and lungs in a bird, dorsal view
(From Animal Physiology, M. Stewart, 1991)
Figure 2.
Picture of air sacs and lungs in a bird, dorsal view
(From Animal Physiology, M. Stewart, 1991)
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