The Incus
The incus, also known as the anvil, is a bone situated between the malleus and the stapes in the ear. Its main function is to transmit vibrations deeper into the ear. The incus is connected to the stapes through connective tissue, while the top of the malleus and the body of the incus are firmly held together by a well-fitted joint. In terms of size, the incus is slightly larger than the malleus, typically measuring around 9 millimeters in length and 5 millimeters in width for most adults.
The Stapes
The stapes, also known as the stirrup, is the tiniest bone found in the human body, typically measuring less than 3 millimeters in size. Resembling a riding stirrup, this bone plays a crucial role in the auditory system. Acting as the footplate, the stapes is often compared to a tuning fork due to its ability to absorb and transmit vibrations, ultimately converting them into sound.