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22 Cards in this Set

  • Front
  • Back
Anatomy
branch of biology and medicine. The study of a physical structure.
Gross Anatomy
anatomy that is visible to the naked eye.
Microscopic Anatomy
has to be seen with a microscope.
Physiology
Science of the function of living systems. A branch of biology, and study of the function of anatomy.
Histology
Study of the organization of tissue.
Cytology
The study of cells.
Peripheral Auditory System
Consists of outer ear, middle ear, and inner ear.
Outer Ear
collects sounds from the environment and funnels them down the ear canal to the eardrum.
Eardrum
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.
Physiological Divisions
Two subdivisions; the outer ear and the inner ear.
Outer Ear
Following components:

pinna (or auricle)
external auditory meatus
lateral wall of the tympanic membrane.

The changing acoustic pressures are collected by the outer ear.
Pinna
Filters and "collects" sound.

Formed of Cartilage
Various muscles
Many bumps and grooves.
Varies from person to person.

"Where it all begins."
Concha
Gathers acoustic "energy" and funnels it towards the ear canal.

A very complex resonator.
Tragus
Protects the ear canal.
Pinna Notch Effect
increases some sounds and decreases others (like a filter).
External Auditory Meatus
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.
Cranial Nerve V.
Trigeminal Nerve
Cranial Nerve VII.
Facial
Cranial Nerve IX.
Glossopharyngeal
Sebaceous Glands
Located in the ear canal, and create sebum (odorless combination of fatty acids).
Cranial Nerve X.
Vagus
Earwax (cerumen)
A combination of sebum and secretions from the apocrine sweat glands.