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Description: (A) Large air sacs attach to two small, inelastic lungs. Air flows in through many air tubes inside the lung, and into posterior air sacs. (B) The lining of the tiniest of the air tubes, sometimes called air capillaries, is the respiratory surface. Picture Stats: Views: 179 Filesize: 105.33kB Height: 798 Width: 1500 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47481 |