Bicephalic ribs, each ribs has two articulating surfaces on its dorsal end hence are called as bicephalic ribs.
True ribs are the first seven pairs of ribs dorsally these ribs are attached to the thoracic vertebrae and ventrally connected to the sternum with the help of hyaline cartilage.
Floating ribs are the last two pair of ribs and are not-connected ventrally to the sternum therefore, called as floating ribs.
Final Answer:
Bicephalic ribs have two articulating surfaces on its dorsal end.
True ribs are the first seven pairs of ribs dorsally these ribs are attached to the thoracic vertebrae and ventrally connected to the sternum with the help of hyaline cartilage.
Floating ribs are the last two pair of ribs and are not-connected ventrally to the sternum.