The eardrum is about 2.5cm to 3.5cm from the external ear canal, and is located between the external ear canal and the tympanum. The height of the eardrum is about 9mm, the width is about 8mm, the average area is about 90mm, and the thickness is 0.1mm. It is placed obliquely in the external auditory meatus and forms a base 45 to 50 with the external auditory meatus.
Membrane labyrinth is filled with endolymphatic fluid, and the space between bone labyrinth and membrane labyrinth is filled with external lymphatic fluid, and internal and external lymphatic fluids are not connected with each other. The ossicle of the human ossicle consists of the hammer bone, anvil bone, and sacrum.
The internal ear is also called labyrinth because of its complex structure. It is buried in the bone of the temporal bone, between the tympanic cavity and the bottom of the inner ear canal. It is composed of labyrinth and membrane labyrinth. Bone fan is surrounded by dense bone, which is a tortuous and irregular bone tunnel located in the temporal bone.
This model is composed of 3 parts including inner ear, tympanic auditory ossicle, and cochlea, and shows the structure of inner ear labyrinth, tympanic membrane, auditory ossicle and cochlea, vestibular cochlea nerve, etc. There are 20 indicators in total.
The malleolus is located on the inner side of the tympanic membrane, between the mucosal layer and the fibrous layer. The metatarsal foot plate is a circular ligament connected to the oval window. The anvil is between the hammer and the sacrum.