Page 55 - Human anatomy COMPLETELY DONE1

THE HUMAN HEARING ORGAN. STRUCTURE AND MECHANISM OF
OPERATION

The hearing organ (ear) is part of the auditory analyzer (figure 35), which also
includes the auditory nerve and the brain centers responsible for analyzing sound
information.
With the help of the hearing organ, sound vibrations are converted into nerve impulses.
For a person, hearing is important not only because it allows you to perceive
sound signals from the environment, but also because of speech communication.
The hearing organ consists of the outer, middle and inner ear.

Figure 35. Structure of the ear

Outer ear
The outer ear includes the auricle, which is available only in mammals, and the
external auditory canal, sometimes the eardrum.
The auricle, not counting the lobe, consists of a skin-covered elastic cartilage of
complex shape. In humans, the auricle is usually motionless due to atrophy of the ear
muscles, although many mammals can "move their ears", this allows more accurately
determining the source of sound. In humans, this function is assumed by a special

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