The middle ear part is composed of three small bones, the INCUS (5 letters), the malleus (5 letters) and the stapes (5 letters). The INCUS is also known as the anvil, and it is the second-smallest bone in the body. The COB (3 letters) is the smallest bone in the body and is located between the INCUS and the stapes. All three bones are connected to each other and work together to transmit sound vibrations from the eardrum to the inner ear.