is your ear drum part of middle or external ear
Eardrum - Additional images. 1  External and middle ear, opened from the front (right side) 2  Horizontal section through left ear; upper half of section. 3  The right membrana tympani with the hammer and the chorda tympani, viewed from within, from behind, and from above. 4  Auditory tube, laid open by a cut in its long axis.