Hearing and the Human Ear ppt video online from Various Function of the Human Ear
There are various functions of the human ear, but first let’s talk about the structure of the ear first. The ear is located on the each side of the human head that works as human auditory organ in general. Human ear have three parts, the external ear, the middle ear, and the inner ear. The external ear consists of the auricle, and then the auditory canal and the eardrum (placed in sequence from outer to inner). The middle ear is formed by the 3 smallest bones in the human body: the malleus, the incus and the stapes. The inner ear is composed of the cochlea filled with liquid; the cochlear canal has 20,000 ciliated cells (nerve cells which transmit the signals to the brain) in each ear.
Hearing function of the human ear
Function of the human ear in general is to be the human’s auditory sense. That means the ear is human’s means to be able to hear sounds. The process of how the sound could be heard by human is almost too complicated to think for common people. First, the sound arrives in the auditory canal. Then the sound will vibrate the eardrum and the malleus and incus bones transmit the vibration. The inner ear will decode the sound and sends it to the auditory nerves. Then the audiroty nerves will convey the sound to the brain to be analyzed and interpreted. Then the human will respond accordingly to the sound.
Motor and reflex function of the human ear
Human ear is also an important motor and reflex organ for human. The Human ear determines balance in human’s body because of its inner ear’s ability to determine head’s position. In the inner ear, the balance system consists of three semicircular canals that contain fluid and “sensors” that detect rotational movement of the head. Each of the semicircular canals lies at a different angle and is situated at a right angle to each other. The semicircular canals deal with different movement: up-and-down, side-to-side, and tilting from one side to the other. All contain sensory hair cells that are activated by movement of inner ear fluid. That’s why the function of the human ear also for motor and reflex function.
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