Biology 30 : The Ears

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20 Terms

1
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Pinna (Front Top)

Outer part of ear and acts like a funnel , taking sound from a large area and channelling it into a small canal.

<p>Outer part of ear and acts like a funnel , taking sound from a large area and channelling it into a small canal.</p>
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Auditory Canal (Front Under pinna )

Carries sound waves to eardrum.

<p>Carries sound waves to eardrum.</p>
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Ear Drum- Tympanic Membrane ( Middle )

Thin Layer of tissue that receives sound vibrations.

<p>Thin Layer of tissue that receives sound vibrations.</p>
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Ossicles ( Behind Ear Drum-3t )

Tiny bones that amplify /carry sound in the middle ear.

<p>Tiny bones that amplify /carry sound in the middle ear.</p>
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Auditory Nerve ( Back )

sensory nerve that transfers auditory information from the cochlea (auditory area of the inner ear) to the brain. It is one of the many pieces that make up the auditory system, which enables effective hearing.

<p>sensory nerve that transfers auditory information from the cochlea (auditory area of the inner ear) to the brain. It is one of the many pieces that make up the auditory system, which enables effective hearing.</p>
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Cochlea (Very back , snail looking )

Coiled structure of the inner ear that responds to various sound waves and converts them into nerve impulses.

<p>Coiled structure of the inner ear that responds to various sound waves and converts them into nerve impulses.</p>
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Eustachain Tube (Back Tube )

Air-filled tube of the middle ear that equalizes pressure between external and internal ear.

<p>Air-filled tube of the middle ear that equalizes pressure between external and internal ear.</p>
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Vestibule ( behind ossicles )

Chamber found at the base of the Semicircular Canals that provides information about static equilibrium.

<p>Chamber found at the base of the Semicircular Canals that provides information about static equilibrium.</p>
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Semicircular Canal (Top back , 3 circles )

Fluid-filled structures within the inner ear that provide information about Dynamic equilibrium.

<p>Fluid-filled structures within the inner ear that provide information about Dynamic equilibrium.</p>
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Organ of Corti

Primary Sound receptor in Cochlea

<p>Primary Sound receptor in Cochlea</p>
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Basilar Membrane

Anchors the receptor hair cells in the Organ Of Corti.

<p>Anchors the receptor hair cells in the Organ Of Corti.</p>
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Oval Window

an oval opening at the head of the cochlea, connecting the middle and inner ear, through which sound vibrations of the stapes are transmitted.

<p>an oval opening at the head of the cochlea, connecting the middle and inner ear, through which sound vibrations of the stapes are transmitted.</p>
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Inner Ear

Vestibule , Semicircular Canals , Cochlea

<p>Vestibule , Semicircular Canals , Cochlea</p>
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Middle Ear

Ossicles , Ear drum , Oval Window , Eustachain tube

<p>Ossicles , Ear drum , Oval Window , Eustachain tube</p>
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External Ear

Pinna and Auditory Canal

<p>Pinna and Auditory Canal</p>
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Static Equilibrium

When forces acting on an object which is at rest are balanced, then we say that the object is in a state of static equilibrium

<p>When forces acting on an object which is at rest are balanced, then we say that the object is in a state of static equilibrium</p>
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Dynamic Equilibrium

Describes any system with constant change in which the components can adjust to the changes without disturbing the entire system.

<p>Describes any system with constant change in which the components can adjust to the changes without disturbing the entire system.</p>
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EAR SEQUENCE

1235

AUDITORY CANAL 1

EAR DRUM 2

OSSICLES 3

COCHLEA 5

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What is the function of the inner ear ?

Transmit vibrations to the brain

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What is the function of the middle ear?

A. Transforms sound waves into vibrations