Plate 2: Middle Ear Viewed from Within (1) Sigmoid Sinus - (2) Jugular Bulb - (3) Hypotympanum - (4) Internal Carotid Artery - (5) Eustachian Tube - (6) Descending Portion of Facial Nerve - (7) Aditus Ad Antrum - (8) Chorda Tympani Nerve - (9) Hammer Handle - (10) Epitympanic Space - (11) Head of Malleus - (12) Inner Aspect of Tympanic Membrane - (13) Tensor Tympanic Muscle