Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
|
External Ear
|
1) Auricle (pinna) 2) External Acoustic meatus (auditory canal). 3) Tympanic membrane (eardrum)
|
|
|
Auricle (pinna)
|
Collects and directs sound waves into auditory canal and then into the tympanic membrane.
|
|
|
External acoustic meatus (auditory canal)
|
Numerous glands line the canal and secrete earwax to lubricate and protect the ear.
|
|
|
Eardrum
|
Separates the external ear from the middle ear.
|
|
|
Middle Ear
|
Ossicles: 1) Malleus 2) incus 3) Stapes; has several openings; is lined with mucous membrane.
|
|
|
Inner Ear
|
1) Cochlea 2( Vestibule 3) Semicircular canals
|
|
|
Cochlea
|
Contains organ of Corti=organ of hearing.
|
|
|
Vestibule
|
Contains membranous pouches utricle and saccule that contain perilymph. The utricle communicates with the semicircular canals and contains hair cell sensory receptors connected to fibers from the 8th cranial nerve. These hair cells react to the force of gravity and movement of otoliths, and are a part of the sense of equilibrium.
|
|
|
Semicircular canals.
|
Contain nerve endings in the form of hair cells that note changes in the position of the head and reports such movement to the brain through fibers leading to the 8th cranial nerve.
|
