There are 12 pairs of ribs. All 12 pairs connect directly to the thoracic vertebrae.
12 vertebrae have ribs attatched
The ribs attached to 11 and 12 do not connect to anything in the front of the body. They are said to be, "Floating".
In the anterior position (front), the ribs connect to the sternum (breast bone) and in the posterior position (back), the vertebrae. There are free ribs that do not attach at the sternum, they just attach at the vertebrae.
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.
12
The next 12 vertebrae. Develops a posterior curvature. Labeled T1 to T12. Supports the ribs. There are 12 pairs of ribs regardless of the sex of the individual.
the strnum, 12 pairs of ribs, and 12 thoracic vertebrae.
The thoracic section of the vertebrae include 12 bones, one for each set of ribs.
Twelve pair is the norm, but about 5% have one or more extra ribs.
The thoracic vertebra
Wolves have 24 ribs. Two ribs are floating ribs, and the rest connect the sternum to the thoracic vertebrae. That's the same number that humans have.