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| Description: The x-ray images reveal how inhalation and expiration change the lung volume. Inward Outward flow of air flow of air A Inhalation. Diaphragm contracts, B Exhalation. Diaphragm, external moves down. External intercostal intercostal muscles return to resting muscles contract, lift rib cage upward positions. Rib cage moves down. and outward. Lung volume expands. Lungs recoil passively. Picture Stats: Views: 123 Filesize: 357.12kB Height: 1500 Width: 1271 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47487 |