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Tuesday, November 15, 2011

Functions Of The Ear -- Lesson 279


In this post we would learn about the functions of the ear. Generally the ear can be divided into three separate regions. They are 1. Outer ear, 2. Middle ear and 3. Inner ear. These outer and middle ears function in the conduction of sound waves through the ear. The inner ear contains structures that receive the auditory waves and relay them to the brain. The auditory or estachian tube is a canal leading which is from middle ear to the pharynx. In an efficient way, this tube can prevent damage to the eardrum and shock to the middle and inner ears.  The pressure of air in the middle ear is equal to the pressure of the air in the external environment.

Functions of Middle Ear: Whenever we speak the outer ear collects the sound waves and sends them through the auditory canal. That is the vibrations are carried through the auditory canal to the eardrum. Then this vibrations goes to the middle ear. The smallest bones which are in the middle ear converts this vibrations in the air into liquid and then reaches to inner ear. In this inner ear the liquid causes vibration of the basilar membrane. The main spiral organ or corti is located. Approximately, 20,000 hearing cells were created by electric impulses. This nerve receives the impulses and passes them.

Functions of Inner Ear:  Actually the main basic function of the ear is hearing. Balancing is also other important function of the ear. Oriented at the right angles. With effect to gravity another part of the inner ear sends information to the brain in an idle position. The eardrum is a sensitive organ. It can detect the sounds and this vibration is transferred to the inner ear for further proceeding. The pinna and the ear canal pass the sound waves to the middle ear. As ear is the sensitive organ, we should never use  pins or pencil points or any type of fig into the ear. We have to use cotton ear buds to clean. We should keep our ears clean so that loss of hearing may be detected. A human ear can detect in the range of frequence between 16 hertz to 16384 hertz. 

In the next post we would learn some definitions shortly regarding this post.

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