Vocab #6 Flashcards Preview

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Flashcards in Vocab #6 Deck (26)
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three parts
located on the lateral sides of the head
identifies, locates, and interprets sound
maintains equilibrium


external ear

consists of the pinna (auricle), the external auditory canal, and the lateral surface of the tympanic membrane
brings sound into the ear and prevents infection of the ear and objects from entering it


middle ear

air-filled cavity in the temporal bone that contains the ossicles: malleus, incus, stapes
transmit vibrations from the tympanic membrane mechanically to the inner ear


inner ear

contains the vestibule, semicircular canals, and cochlea
changes vibrations to electrical signals
responsible for balance and hearing


tympanic membrane

separates the external and middle ear
translucent and permits visualization of the inner ear



cartilage framework of the external ear covered in skin
gathers or channels sound into the ear


ceruminous glands

glands in the external ear that produce cerumen



lubricates the ear canal and tympanic membrane while serving as a protective barrier against foreign matter and bacteria



three bones in the middle ear that transmit vibrations from the tympanic membrane mechanically to the inner ear


vestibule (ear)

part of the inner ear
directly responsible for balance as the fluid in the semicircular canals shifts with head movement


semicircular canals

three canals (anterior, posterior, lateral) in the inner ear that are responsible for interpreting head rotation



encodes the previous mechanical vibrations as electrical impulses that are then sent to the eighth cranial nerve


external nose

consists of bone in the proximal third of the nose and cartilage in the lower two thirds covered by thin
nasal bones arise from extension of the frontal and maxillary bones, forming the nasal bridge
the hard and soft palates form the floor of the nose and the frontal and sphenoid from the roof
humidifies, filters, and warms inspired air and serves as a passageway for expired air


internal nose

divided into two anterior cavities (vestibules) by the septum
air enters the nose through the nostrils and passes posteriorly to the nasopharynx through one of the choanae


cribiform plate

part of the ethmoid bone on the roof of the nose
houses the sensory endings of the olfactory nerve


Kiesselbach's plexus

group of small fragile arteries and veins located on the anterior superior portion of the septum
often responsible for epistaxis (nose bleeds)


paranasal sinuses

air-filled spaces within the cranium
generally named for their location and drain into respective nasal cavities
lighten the weight of the skull bones and serve as resonators for sound production
produce mucus from the membranes that line the cavities, which drains into the nasal cavity
common site for inflammation because they are narrow and occlude easily


oral cavtiy

consists of the lips, cheeks, tongue, teeth, and salivary glands
serves as a passage for food as well as the initiation of digestion by mastication and salivary secretion
mouth and oropharynx also serve to emit air for vocalization and expiration


vestibule (oral)

area between the buccal mucosa and the outer surface of the teeth and gums
provides a space between the teeth and the lips


soft palate

muscular tissue covered by mucous membrane that plays an active role in swallowing and vocal resonance
part of the roof of the mouth



skeletal muscle covered by mucous membrane, which helps to form the floor of the mouth and is anchored to the mouth by the frenulum
papillae on its surface assist in movement of food
taste buds are contained within the papillae and allow taste


parotid glands

lies within each cheek, just anterior to the ear
largest of the salivary glands
produces saliva


submandibular glands

lie beneath the left and right mandibles at the angle of the jaw
produce saliva


sublingual glands

lie under the tongue
smallest of the three glands
produce saliva



consists of the combined upper parts of the respiratory and digestive tracts: nasopharynx, oropharynx, laryngopharynx
filter, warm, and moisten air and conduct it into the lungs



"voice box" located in the anterior neck
functions in respiration, prevents food and saliva from entering the respiratory tract, and produces sound;
protected anteriorly by the thyroid cartilage and inferiorly by the cricoid cartilage