Sunday, 28 October 2018

External Ear Anatomy and Function

external ear anatomy pinna,  parts of the outer ear,  middle ear anatomy,  ear anatomy and function
External Ear Anatomy and Function
To know External Ear Anatomy and Function first of all you must know that
The ear has three parts, outer, middle and inner ears. In order to understand the sound by working together to transfer the sound from the outer ear to the inner part of the middle ear and in the inner part of the ear, all three parts are necessary. The ears also help in maintaining your balance.

External ears include in
External Ear Anatomy :

  • Orlich (cartilage preserved by the skin on opposite sides of the head)
  • Shravan Canal (also called ear canal)
  • Ardrum outer layer (also called timepenic membrane)
  • The outer part of the ear sound store. The sound runs through chaos and hearing canal, a small tube that ends at the ends in half.
  • The outer ear is the outer part of the ear which you see, which collects the sound waves, and directs it to the ear.

Pinna
Pinna is the only visible part of the ear (archeical). It has a different helical shape. This is the first part of the ear that responds to the sound. Pinna's work is to act as a funnel that helps the ear to play further and deeply.
  • Without this funnel, the sound will take another straight forward round in the Shravan Canal. It will be difficult, and the more incompetence the voice will be lost, it listens for hearing and understanding.
  • It is compulsory to drink due to difference in pressure vs. the pressure outside the ear. The resistance of air is significantly higher than inside the ear because the air inside the ear is solid and is therefore under high pressure.
  • For the sound waves to enter the ear in the most effective method, the resistance can not be too high. Pinna helps in optimizing the difference in the pressure inside the ear. Pina acts as an intermediate link that makes the transition smooth and less brutal, causing the auditory canal (muscles)

Ear canal - auditory canal
After spreading the sound waves through pinna, they travel between two to three centimeters in the auditory canal, then kill the ardrum, also called the tempanyal membrane. The work of the ear canal is to transmit sound from Pinna to Ardham.
Ardram
Ardrum (also known as the Tempanian membrane), at the end of the auditory canal, is a membrane and indicates the beginning of the middle ear. Armam is quite delicate, and compression from sound waves makes the order vibration. For safety, the auditory canal is moderately curved, which makes it more difficult for the particles, worms reach the reach of peaches. In addition, earwax (serum) in the Shravan Canal also helps to keep unwanted material like ear dust and insects out of the ear.
  • Along with the protection of the Ardram, the Shravan Canal also acts as a natural hearing aid; He mechanically increases the low and less curved sound of the human voice. This ability allows compensation for some weakness of the ear's human weakness and makes ear to listen and understand normal conversations.

external ear anatomy pinna,  parts of the outer ear,  middle ear anatomy,  ear anatomy and function
External Ear Anatomy and Function

The middle ear is a part of the ear that is present between the ardrum and the oval window. The middle ear sends sound from the outer ear to the inner ear. There are three different bones in the middle ear: Hummer (Mallis), avil (ink) and stirrup (steppes), oval window, round window and Eustachian tube.
Middle ear bones
The ardrum is very thin, measures approximately 8-10 mm in diameter and is spread by small muscles. Compression from sound waves makes the ardrum oscillate.
  • Vibration is expressed in the ear through three bones in the middle ear; Hammer (Mallyus), Avil (Inks) and stirrup (Steps). These three bones form the bridge structure, and the last bone, stirrup, the last bone that receives the sound, is connected to the oval window.
  • When the sound waves spread from the oval to the oval window; The middle ear works to move the ears of the ear and to increase the sound waves before moving on in the inner ear. The pressure of the sound wave on the oval window is approximately 20 times higher than the order of the order.
  • The pressure increases due to variation in size between some large surface of the ardum and the small surface of the oral window. An example of the same principle is, when a person, wearing a shoe with a sharp stiletto heel, steps on his feet. The small surface of the heel will cause more pressure and pain than a flat shoe with a large surface

Round window
The round window is in the middle ear, the vibration in the opposite phase of the vibrations entering the inner ear through the oval window. Through this method, to transfer fluid into Kochali.
Eustachian tube
Eustachian tube is also found in the middle ear and connects the ear with the rearmost part of the ear. The purpose of the Eustachian tube is to equal the air pressure on both sides of the ardrum. It prevents pressure from building in the ear. When you swallow, Eustachian tube opens, thus the pressure inside and outside the ear is equal.
  • In most cases, the pressure is automatically equal, but if it does not happen, then it can be brought about an energetic swallowing process. The swallowing action will force the tube to connect the rhythm with the rhythm, which will equal the pressure.
  • Additional pressure can be made in those conditions where the separation from the outside of the Ardrum inside the Ardham. If the pressure is not equal, the pressure will increase on the diode, it will prevent the sound from moving properly. The restricted vibration results in a slight decrease in the ability to hear results, which can cause a muffling sensation. An important difference in pressure causes discomfort and even minor pain, the pressure built into the ear is often in situations where the pressure often changes, for example, when flying on the plane or driving through mountainous areas do.

Internal ear anatomy
The inner ear is in the lower part of the ear, which includes the cholera part, balance device, the vestibular and the auditory nerve.
  • After spreading the vibrations of Armram into the oval window, sound waves continue their journey in the inner ear.
  • The inner ear has various tubes and pathways known as the maze. There is a vestibular and cochlea in the maze.


Kochali
Kochali transforms sound waves into electrical impulses, which are sent to the brain. The brain will then translate the impulses into the sounds we understand.
  • Kochali is shaped like a small snail shell or wound-up tube. Kochali is captured with Perilimph fluid along with two tightly held membranes. This membrane forms a type of divider wall in Cochle. Nevertheless, to transfer the perillimph fluid from one side of the separator wall to Kochali easily, there is a small hole in the wall (helicotrima). The holes are necessary to ensure that the vibration from the oval window spreads to all liquids in Cochlea.
  • When Perilimph fluid travels inside Cochlea, thousands of micro-hair fibers are activated within the separator wall. There are approximately 24,000 of these hair fibers arranged in four long lines.

auditory nerve
Hearing is a combination of nerve fibers which transports information in Kochali, inner ear and brain. The purpose of the auditory nerve is to send the signal to the inner ear in the brain.
  • Hair fibers in Cochlere are all linked to the auditory nerve and, based on the type of movements in the Cochlor fluid; Different hair fibers begin to move.
  • During the hair fiber movement, electric signals are sent to the hearing nerve associated with the hearing center of the brain. In the brain, these electrical impulses are converted into sounds, which we recognize and understand. As an effect; These hair fibers are fundamental to our hearing capacity. If these hair fibers get spoiled, then our hearing capacity will get worse.

Vestibular - equilibrium tool
The vestibular is another essential part of the inner ear. Vestibular is the organ of balance. The role of the Vestibular is to record and broadcast the movements of the body, thus ensuring that we can maintain our balance.

The Westibular consists of three ring-shaped paths, which are in three different planes. All three highways are filled with fluid which proceed with body activities. Along with this fluid, there are thousands of micro-hair fibers in these routes, which send a small impulse to the brain and respond to the movement of the fluid. The brain will then decode these pulses that can be used to help the body balance is.
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