How long is the Malleus bone in the ear?

The malleus, commonly known as the hammer, is one of the three tiny bones located in the middle ear, which also include the incus and stapes. The malleus is approximately 9mm in length, which makes option C the correct answer.

In understanding the structure of the malleus, it's important to note that it has a head, which articulates with the incus, and a handle (also called the manubrium) that connects to the tympanic membrane (eardrum). The size of the malleus is significant because it plays a crucial role in the mechanical transmission of sound vibrations from the tympanic membrane to the inner ear. The accurate measurement of the malleus, along with the other ossicles, is essential for understanding auditory function and diagnosing potential hearing impairments.

The other lengths listed in the other choices (5mm, 7mm, and 11mm) do not reflect the anatomical measurement of the malleus, thereby confirming the choice of 9mm as the most accurate length. Understanding the specific size of the malleus helps in further studies of middle ear anatomy and its functions in hearing.