supernumerary ribs

What Are Ribs 11 And 12 Called? Ribs 11 and 12 do not have an anterior attachment and end in the abdominal musculature. Because of this, they are sometimes called ‘floating ribs‘. What type of ribs are the 11th and 12th? The last two false ribs (11–12) are also called floating ribs (vertebral ribs). These