In the tympanic cavity there is an aperture in which the stapes is fit...
The fenestra ovalis connects the tiny bones of the middle ear to the scala vestibuli, which is the upper part of the cochlea. The bone of the middle ear that actually connects to the fenestra ovalis is called the stirrup, or stapes.
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In the tympanic cavity there is an aperture in which the stapes is fit...
Aperture in the Tympanic Cavity
The correct answer is option C, which is the "Fenestra ovalis." This aperture is located in the tympanic cavity and is where the stapes bone is fitted.
Explanation:
- Fenestra Ovalis: Also known as the oval window, this aperture is located on the medial wall of the middle ear. It is covered by the base of the stapes, one of the three auditory ossicles in the middle ear.
- Tympanic Cavity: This is a hollow space in the temporal bone of the skull that houses the auditory ossicles and is connected to the nasopharynx via the Eustachian tube. The tympanic cavity plays a crucial role in transmitting sound vibrations from the outer ear to the inner ear.
- Stapes: The stapes is the smallest and lightest bone in the human body. It is attached to the incus (anvil) and transmits sound vibrations from the incus to the oval window, where they are then transferred to the fluid-filled cochlea in the inner ear.
- Function: The fenestra ovalis plays a vital role in the process of hearing. When sound waves enter the ear canal, they cause the tympanic membrane to vibrate. These vibrations are then amplified by the auditory ossicles, with the stapes ultimately transmitting them to the oval window. This sets the fluid in the cochlea into motion, stimulating the hair cells responsible for converting sound into electrical signals that are sent to the brain for interpretation.
In conclusion, the fenestra ovalis in the tympanic cavity serves as the entry point for sound vibrations to enter the inner ear, highlighting its importance in the auditory system.
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