The external ear is formed by the auricular pavilion, the external auditory canal and the lateral surface of the tympanic membrane. Its function is that of the sound waves trap (auricle) and it will send it to the inner ear through the channel and making vibrate the eardrum.
atrium:
The outer part of the outer ear cover is referred to as the headband or earphone. It traps sound waves in the environment and directs it into the ear canal. The earphone is composed of elastic cartilage covered by a thin layer of skin. The known lobe lower part (common name ~ lobe of the ear) is made up of vessels of fibrous tissue, fat and blood.
Ear tips:
The outer margin of the ear is known as the propeller and the high inner margin is anti-propeller. The deeper depression leading to the ear canal is known as the conch. The swallow is the small lateral cartilage that can be pushed down to block the opening of the ear canal.
The external auditory canal:
The auditory canal extends from the carcass to the drum (lateral side of the tympanic membrane) and is known as the external acoustic meatus. It is directed inwards through the temporal bone of the skull (tympanic part) and is about 2 to 3 centimeters long,
The ear canal is a form of S tunnel. The third exterior consists of duplicate cartilage skin that is similar to the auricle skin. The sebaceous and cerumen glands in the third cerumen external products (cerumen). Both are interior third bone and lined with finer skin.
eardrum:
The eardrum (tympanic membrane) divides the outer ear from the middle ear. This is a thin membrane about 1 centimeter in diameter. The lateral part of the tympanic membrane, which faces the auditory canal is lined with a thin skin that continues with the skin of the inner two thirds of the ear canal.
The best description for the eardrum is that it looks like a parabolic antenna. It is therefore concave through the ear canal, which resembles the back of a parabolic antenna with a central depression known as the umbo.
The tympanic membrane moves in and out in response to vibration, similar to that of the speakers. Due to the chain of auditory ossicles, which are attached to the medial surface of the eardrum, the membrane transmits the movement to the inner ear force in which it can be converted into electrical impulses and passed to the brain.
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