Chapter 9 the outer ear Flashcards
The main function of the auricle/Pinna is to
catch sound and funnel it down the external auditory canal
Cartilage in Pinna is very flexible in ______
children and the elderly
Pinna
helps localize sound sources
direct sound into the ear
each individual’s pinna creates a distinctive imprin on the acoustic wave traveling into the auditory canal
Pinna doesn’t have many blood vessels or fat which is why they are prone to _______
frostbites
outer ear
mode of operation: air vibration
function: protection, amplification, localization
outer ear ends at _______
tympanic membrane
Concha
aids in the human ability to localize the sources of sounds that come from behind, below, and above the head.
Funnels sounds directed to it from the surrounding air into opening of the external auditory canal.
helix is a good place of retention for ______
hearing aids
ear wax (cerumen) is manufactured in _____
the outer portion of the external auditory canal
External auditory canal (meatus)
The channel in the external ear from the concha of the auricle to the tympanic membrane.
Cilia
eyelash-like projections of some cells that beat rhythmically to move certain substances over their surfaces
Ear pain in the absence of infection may be caused by
temporomandibular joiint neuralgia
otalgia
ear pain in adults
The angle of the external auditory canal is different in children and adults
children: canal angles downward and more acute angle
cerumen/ear wax
cleans ears. Repel water trap dust, sand particles, micro-organisms, and other debris moisturize epithelium in ear canal odor discourages insects antibiotic, antifungal propeties