The five parts of the left ear can be expanded at 3 times magnification1、 Purpose of the model:The model is suitable for the teaching of basic human anatomy and physiological health, which makes it easy for students to understand the shape and structure of the outer ear, middle ear and inner ear.2、 Structural features:The anterior resection of the external auditory canal showed the morphological structure of the external auditory canal. The temporal bone was cut horizontally to show the shape and structure of the ear and inner ear.External ear: auricle, external auditory canal. Middle ear: tympanic membrane (detachable), tympanic chamber, three ossicles (detachable together), Eustachian tube and mastoid chamber. The inner ear (removable as a whole) shows three bony semicircular canals, vestibule and cochlea