Vibrations of air molecules moving through the air are standard and translated into messages that the brain recognizes as blend by a Gordian organ--the spike heel. The ear has two important, but different, functions: hearing and sensing the bodys equilibrium, or balance. The mechanisms for these processes are located within a hollow quadriceps in the skulls temporal bone.
Parts of the Ear and Hearing
The ear has ternary break dance sections:the outer ear, the middle ear, and the inner ear. Each section performs a specific function, related to either hearing or balance. The three parts of the outer ear are the auricle (also called the pinna), the outer auditory meatus (or ear canal), and the tympanic membrane (or eardrum).
The pinna collects grueling waves from the air. It funnels them into a channellike tube, the external auditory meatus . This is a curved corridor that leads to the tympanic membrane.
The eardrum separates the external ear from the middle ear. The middle ear is an irregular-shaped, air-filled space, about 0.75 inch (1.9 centimeters) high and 0.2 inch (0.5 centimeter) wide. A chainlike link of three tiny bones, the ossicles, spans the middle ear.
When sound waves strike the outer surface of the eardrum, it vibrates. These vibrations are mechanically familial through the middle ear by the ossicles.
The malleus, or hammer, is the prime(prenominal) ossicle to receive vibrations from the eardrum. It passes them to the second ossicle--the incus, or anvil. The third ossicle--the stapes or stirrup--relays the vibrations to a membrane that covers the col into the inner ear. This opening is the round window.
Like the eardrum, the round windows membrane transmits vibrations. It directs vibrations into the inner ear, where they enter a fluid that fills a structure called the cochlea. This is a coiled tube that resembles a...
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