Term
| Name the 3 divisions of the ear |
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Definition
1. External
2. Middle
3. Inner |
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Term
| Name the 3 structures of the outer ear |
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Definition
1. Auricle
2. Tympanic membrane
3. Acoustic canal |
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Term
| Describe the boundaries of the external ear |
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Definition
| From the auricle to the tympanic membrane, via the acoustic canal |
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Term
| What type of tissue comprises the auricle? |
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Definition
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Term
| What type of tissue comprises the acoustic canal? |
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Definition
| Lateral 1/3 is cartilage, medial 2/3 is bony |
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Term
| List 3 features of the epithelia of the outer portion of the acoustic canal |
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Definition
- Hair
- Sebaceous glands
- Ceruminous glands |
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Term
| What structure makes up the middle ear? |
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Definition
| It is a chamber in the temporal bone |
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Term
| Name the features of the middle ear |
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Definition
- Ossicles
- Entrance to the auditory tube
- Round window
- Oval window |
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Term
| Name the 3 ossicles, in order from lateral to medial |
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Definition
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Term
| What is the function of the ossicles? |
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Definition
| Connect the tympanic membrane to the oval window and its membrane to transmit sound to the inner ear |
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Term
| How is the inner ear formed? What is this structure known as? |
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Definition
| Hollowed from the bone - a bony labyrinth |
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Term
| What is the membranous labyrinth? |
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Definition
| A series of membranous sacs |
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Term
| What fluid is found within the bony labyrinth? The membranous? |
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Definition
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Term
| What organ senses hearing? |
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Definition
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Term
| What organs sense balance? |
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Definition
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Term
| What nerve innervates the organs of sensation in the ear? |
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Definition
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