17+ Ear Anatomy Tympanic Membrane Images. The thin semitransparent tympanic membrane , or eardrum, which forms the boundary between the outer ear and the middle ear, is stretched obliquely across the end of the external canal. The tympanic membrane is shaped like a flat cone pointing into the middle and inner ear.
The tympanic membrane is derived from the invagination and meeting of the one pharyngeal groove with the one pharyngeal pouch, and as such. The middle ear takes up the space behind the tympanic membrane, inside the temporal bone. The ossicles of the ear are the only bones fully formed at birth.
The eardrum comprises two parts, the pars tensa, which is the main part of the eardrum, and the pars flaccida.
Driving at high altitudes, scuba diving. The tympanic membrane divides the external ear from the middle ear. The scala tympani is covered by a secondary tympanic membrane. The anatomy of ear consists of external ear, middle ear and inner ear.