The Special Senses Lesson 2: The Senses of Hearing, Taste, Smell and Touch.
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Transcript of The Special Senses Lesson 2: The Senses of Hearing, Taste, Smell and Touch.
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The Special SensesLesson 2:The Senses of Hearing, Taste, Smell and Touch
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Lesson ObjectivesUpon completion of this lesson, students should be able to …
Describe the anatomy of the ear and briefly explain the function of each structure.
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Lesson ObjectivesDescribe the anatomy of the nose and
explain how the sense of smell occurs.Identify the anatomical structures that
make up the special senses.Discuss the sense of taste, and briefly
explain the function of taste buds.
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Anatomy of the Ear
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Three Main Divisions of the Ear
External earMiddle earInner ear
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Label ear
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Structure and Function of the External EarPinna, or auricle:
Funnels sound waves
Auditory canal, or auditory meatus: S-shaped, secretes cerumen
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Structure and Function of the External EarTympanic membrane, or eardrum: Separates the external ear from the middle ear
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Take a closer look:Otoscope
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Structure and Function of the Middle Ear Contains : malleus (hammer), incus (anvil), stapes (stirrup)
FunctionTransmits sound vibrations Equalizes air pressureProtects from damaging noise
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Structure and Function of the Inner Ear
Bony labyrinth : Cochlea, vestibule, and three semicircular canals
Cilia=Tiny hair cells
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Structure and Function of the Inner EarEustachian tube extends from the middle ear to the nasopharynx
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Hearing testhttp://www.freehearingtest.com/test.shtml
Or use audiometer
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Path of Sound Vibrations
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Two Most Common Types of Hearing Disorders
Conductive: Hearing loss can be corrected
Sensorineural: Hearing loss cannot be corrected
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Four Types of Taste CellsSweetSourSaltyBitter
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The Sense of TouchOldest, most primitive sense
More nerve endings equals more sensitivity
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Medical Specialists
Ears, nose and throat specialist
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