The last two ribs, located at the bottom of the cage, are not attached to anything in front and are called floating ribs. Each area of the spine has a curve, and the thoracic spine is no exception.

At an early stage in vertebrates' embryonic development somites form: these are primitive segments from which the spine, ribs, back muscles, cartilage, tendons and part of the skin develop. It is ...

True, false and floating ribs. Your ribcage is assembled from three types of bone - your sternum, 12 pairs of ribs and 12 thoracic vertebrae. All of your ribs attach to your spine, but only the ...

More ancient vertebrates, like frogs, dinosaurs and primitive fish, have ribs along the whole length of their spine, from neck to tail, allowing only limited movement in the body.

More ancient vertebrates, like frogs, dinosaurs and primitive fish, have ribs along the whole length of their spine, from neck to tail, allowing only limited movement in the body.