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22 Cards in this Set
- Front
- Back
Anatomy
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branch of biology and medicine. The study of a physical structure.
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Gross Anatomy
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anatomy that is visible to the naked eye.
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Microscopic Anatomy
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has to be seen with a microscope.
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Physiology
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Science of the function of living systems. A branch of biology, and study of the function of anatomy.
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Histology
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Study of the organization of tissue.
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Cytology
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The study of cells.
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Peripheral Auditory System
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Consists of outer ear, middle ear, and inner ear.
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Outer Ear
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collects sounds from the environment and funnels them down the ear canal to the eardrum.
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Eardrum
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Also known as the tympanic membrane.
When this vibrates, it activates the hammer, anvil, and stirrup. This movement amplifies the sounds and moves them to the inner ear. |
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Physiological Divisions
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Two subdivisions; the outer ear and the inner ear.
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Outer Ear
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Following components:
pinna (or auricle) external auditory meatus lateral wall of the tympanic membrane. The changing acoustic pressures are collected by the outer ear. |
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Pinna
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Filters and "collects" sound.
Formed of Cartilage Various muscles Many bumps and grooves. Varies from person to person. "Where it all begins." |
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Concha
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Gathers acoustic "energy" and funnels it towards the ear canal.
A very complex resonator. |
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Tragus
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Protects the ear canal.
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Pinna Notch Effect
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increases some sounds and decreases others (like a filter).
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External Auditory Meatus
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Outer ear canal; 2-3 cm in length.
Lateral third of the canal consists of cartilage (glands and hairs). Medial third consists of bone with a tight thin lining. |
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Cranial Nerve V.
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Trigeminal Nerve
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Cranial Nerve VII.
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Facial
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Cranial Nerve IX.
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Glossopharyngeal
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Sebaceous Glands
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Located in the ear canal, and create sebum (odorless combination of fatty acids).
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Cranial Nerve X.
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Vagus
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Earwax (cerumen)
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A combination of sebum and secretions from the apocrine sweat glands.
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