All of the following are true about the middle ear activity except: (A) Roof is formed by tegmen tympani, (B) Anterior wall has opening of two canals, (C) Medial wall is formed by tympanic membrane, (D) Floor has bulb of internal jugular vein
Answer is C. RELATIONS OF MIDDLE EAR: ROOF-Tegmen tympani FLOOR-Internal jugular vein ANTERIOR WALL-Internal carotid aery, canal for tensor tympani, tubal opening POSTERIOR WALL-Facial canal, aditus to antrum, MEDIAL WALL-Tympanic plexus, promontory, oval window, round window, pyramid LATERAL WALL-Tympanic membrane,chorda tympani nerve, incus, malleus Ref BDC volume 3,sixth edition