The ribs or rafters of the Wharenui are known in Maori as
Lower most two pairs of ribs (11th and 12th) are known as floating ribs because they are only attached to vertebrae but not to the sternum.
Because they do not articulate directly onto the vertebrae.
spine
The lowest two pairs are known as floating ribs.
True ribs
The ribs join at the back. In front they are connected to the thorasic basket, also known as the breast bone. Only the last two ribs do not join each other . They are the floating ribs.
The rib pairs that attach to the back vertebrae but are not connected to the sternum are known as floating ribs. In human anatomy, the 11th and 12th rib pairs are termed floating ribs. There are 12 pairs of ribs. The floating ribs are the lowest two rib pairs that are also called false ribs.
Only the true ribs are attached to the sternum the false ribs (3) and the floating ribs (2) are not directly attached. The flalse ribs are attached indirectly via cartillage and the floating ribs are not attached at all.
13 pairs which consists of 7 pair "true" ribs and 6 pair "false" ribs.
The human rib cage, also known as the thoracic cage
Torso, chest, upper body perhaps?
The correct order of ribs from superior to inferior are true ribs, false ribs, and floating ribs. Humans have 24 ribs.