ENT General 45b7bfee Scutum is ? A Bony pa of outer attic wall B Bony pa of inner attic wall C Cailaginous pa of outer attic wall D Cailagenous pa of inner attic wall High-Yield Explanation Ans. is 'a' i.e., Bony pa of outer attic wall The lateral wall of the middle ear is formed largely by the tympanic membrane and to a lesser extent by the bony outer attic wall called the scutum.