The purpose would have to be flexibility and therefore more protection by not shattering and puncturing the vital organs the ribs are there to protect.
Humans normally have 14 true ribs on the front of their bodies, and 10 false ribs. True ribs are attached directly to the sternum (breastbone) at the front of the body, and the false ribs are not.
they are connected to the breastbone and the spine
Nope - they're immediately below the main rib-cage - and attached to the spine. The're called 'floating' - simply because they're not attached to anything at the front of the body. The rest of the ribs are joined to the sternum (or breastbone).
Sternocostal or costosternal means pertaining to the breastbone and ribs.Costosternal
Floating ribs are the last two pairs of ribs in the ribcage, with one on each side. They are called "floating" because they do not attach to the sternum (breastbone) like the other ribs. Instead, they are attached only to the vertebrae in the back.
Thorax is enclosed by breast bones, ribs and thoracic vertebrae.
Immovable
Breastbone
No. One is a piece of clothing or armor, and the other is an anatomical structure.
It is the Sternum (breastbone).
The breastbone, or sternum, is a flexible plate of cartilage that holds the front of most of the ribs in place to form the thoracic cage.