<prompt> Scutum is ?Bony pa of outer attic wallBony pa of inner attic wallCailaginous pa of outer attic wallCailagenous pa of inner attic wall  <response>: 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. 