What is the stapes bone known as?

Question

The only two bones in the human body which are not articulated with or directly attached to any other bone, are the patella (kneecap) and what other?

Answer 1

Stirrup
It is one of the three tiny bones found in the middle ear of humans and other mammals. The other two bones are the hammer and the anvil, the three being formally known as the malleus, incus and stapes. The bones are system which transfers sound from the eardrum to the inner ear.