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costae fluctuantes, costae fluitantes
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Skeleton woman backpng
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The four floating ribs (indicated with red arrows)
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Profil du tose féminin et du tose masculin d'aprèsThomsongif
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The six lower ribs on a woman (left) and a man Note how small the four floating ribs are, especially on a woman
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c_58
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12262706
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are four
Atypical Rib s (two lowermost pairs, XI-XII) in the
Human Ribcage . They are called so because they are attached to the
Vertebrae only, and not to the
Sternum or
Cartilage coming off of the sternum. Some people are missing one of the two pairs. Others have a third pair. Most, however, possess only two pairs, as mentioned previously.
Their position can be permanently altered by a form of
Body Modification called
Tightlacing , which uses a
Corset to compress and move the ribs.