IV.C.4 Head: External & Inner Ear Page 3 of 3
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Step 6: With the below drawing as a guide, use theHighlight tool, to identify the components of the external ear and middle ear. |
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The temporal bone encases the inner ear. What are the inner ear components? |
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Semicircular canals and the cochlea. |
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Identify the pharyngotympanic tube on the cadaver. What is the other name for this tube? |
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Eustachian tube. |
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What is the function of this tube? |
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Establish atmospheric equalibrium with the middle ear and our enviroment. |
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Notice that the jugular vein passes just beneath the temporal bone. Demonstrate this by adding the right internal jugular vein using the Anatomy icon. |
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What vessels supply the middle ear? What blood vessel supplies the inner ear? |
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Middle ear = Tympanic branch of the maxillary artery and the mastoid branch of the occipital or posterior auricular arteries. Venous drainage is to the pterygoid plexus and superior petrosal sinus. |
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