a. Bicephalic ribs: It is called bicephalic because each of the two ribs has articulating surfaces on the dorsal end and each rib is flat and thin bone which is connected vertically to the sternum and dorsally to the vertebral column.

b. True ribs: The first seven ribs known as true ribs. Ventrally they are connected to the sternum with the help of hyaline cartilage, and it is dorsally attached to the thoracic vertebrae.

c. Floating ribs: These ribs are not connected to the sternum, and they are the last two ribs (11th and 12th ribs) of the rib cage.