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Parts of the Ear
Anatomical components of the ear
Question | Answer |
---|---|
Pinna (Auricle) | Cavity which ends at the tympanic membrane. It collects sound waves and channels them through the External Auditory Meatus. |
Tympanic Membrane (Ear Drum) | Found within the middle ear, or tympanic cavity, and is made up of dense connective tissue. It vibrates when hit by sound waves, and passes vibrations to the auditory ossicles. |
External Auditory Meatus | Canal which channels sound waves to the typanic membrane. |
Cerumeniferous | Exocrine glands which secrete cerumen (earwax) which traps microorganisms. |
Tympanic Cavity | Air filled typanic cavity in the temporal lobe. |
Oval Window | Windows that separate the middle ear from the inner ear. |
Eustacian Tube | Connects the middle ear to the pharynx (throat). |
Auditory Ossicles | The bones of the middle ear, which include the malleus (hammer), incus (anvil), and stapes (stirrup). |
Malleus (Hammer) | Passes on vibrations from the typanic membrane (eardrum) to the incus (anvil). |
Incus (Anvil) | Receives vibrations from malleus (hammer) and transmits the to the stapes (stirrup). |
Stapes (Stirrup) | Receives vibrations from incus (anvil) and transmits them to the oval window. |
Labyrinth | Also known as the inner ear. |
Osseous Labyrinth | Bony canal in the temporal lobe. |
Membranous Labyrinth | A tube which lies within the osseous labyrinth and has a similar shape. It contains the fluid endolymph |
Perilymph | Fluid in between the osseous labyrinth and the membranous labyrinth. |
Vestibule | Contains prorioreceptors for static equilibrium. |
Semi-Circular Canal | Contains prorioreceptors for dynamic equilibrium. |
Cochlea | Contains Organ of Corti which houses the auditory epithelium. |