RALPH HUTCHINGS / VISUALS UNLIMITED, INC. / SCIENCE PHOTO LIBRARY RALPH HUTCHINGS / VISUALS UNLIMITED, INC. / SCIENCE PHOTO LIBRARY
Human sternum or breastbone from behind. The sternum forms the center of the chest and it anchors all the ribs, which insert into notches on the body of the sternum. The manubrium is at the top, the middle section is the body of the sternum, and the lower process is the xiphoid.
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