 ##  [Keel Bone](/keel-bone) 

  ##  [Keel Bone](https://health.quantumdictionary.io/keel-bone-0) 

  
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**Health &amp; Life Sciences Dictionary**

 
Definition

The prominent ventral extension (carina) of the avian sternum that projects as a midline ridge and provides the primary attachment surface and mechanical lever arm for the major flight muscles (pectoralis and supracoracoideus); structurally important for wing stroke force transmission.