It is not likely that any living organism could survive on the martian surface because of insufficient atmosphere cold temperatures ultraviolet radiation

Insufficient atmosphere is the obvious answer but it's also debatable, there have been organisms found in places of the Earth where everyone said it would be impossible to for anything to survive. Extreme depth/pressure and temperatures in the oceans are just examples.

Ifound this on google “the middle ear contains three tiny bones known as the ossicles: malleus, incus, and stapes. the ossicles were given their latin names for their distinctive shapes; they are also referred to as the hammer, anvil, and stirrup, respectively.” i hope this you for what your looking for