Differentiate between middle and inner part of ear

middle= This is the part through which sound travel inside the ear to the eardrum through the auditory canal . sound causes the eardrum nad it's tiny attached bones in the middle portion of the vibration and conducted to the nearby cochlea

inner part= the cochlea is the part of the inner ear . its main function is to transform sound into nerve impulses......

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%