mesosternum
anatomy
Quick Summary
The mesosternum is a part of the sternum, or breastbone, found in mammals. It is located between the manubrium (the upper part) and the xiphisternum (the lower part). In many mammals, the mesosternum is divided into segments called sternebrae, which provide attachment points for the true ribs. In humans, the mesosternum is a long, narrow bone formed from four fused sternebrae, and it articulates with the ribs along its sides. The sternum itself is a central bone in the chest that supports the collarbones and ribs.1
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