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first rib |
Also found in: Wikipedia | 0.03 sec. |
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first rib,
the highest rib of the thoracic cage. It moves about the axis of its neck, raising and lowering the sternum. First rib movement during quiet breathing is negligible, but under conditions of stress it can increase the anteroposterior diameter of the chest. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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