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  1. biological function of the larynx
    • 1. prevent air from escaping lungs
    • 2. prevents foreign objects from going down the larynx
    • 3. forcefully expel foreign substances from entering the larynx or trachea
  2. nonbiological functions of the larynx
    principal nonbio function is sound production but the larynx functions as a sound generator only when it is not fulfilling the vital biological functions
  3. membrane
    thin layer of tissue that binds structures, divides spaces or organs, and lines cavities
  4. ligaments
    band of fibrous connective tissue which connects bones or catilage, or holds organs in place
  5. cartilage
    • a nonvascular connective tissue, softer and more flexible than bone
    • in the early stages of development, cartilage forms the entire skeleton of the body
    • in the adult, it forms the skeletal framework for structures such as the larynx, trachea and ears
  6. bone
    the dense hard supportive tissue that comprises most of the skeletal framework
  7. what are the 3 types of cartilage
    • 1. hyaline
    • 2. elastic
    • 3. fibrous
  8. hyaline
    • bluish white
    • covers the articular surfaces of joints
    • forms the framework of the lower resp tract
    • has a poor blood supply
    • with age, becomes yellowish and cloudy
    • some amount of calcification or ossification
  9. types of hyaline cartilage
    thyroid, cricoid, arytenoids
  10. elastic
    • yellow/opaque
    • flexible and elastic-rubbery in consistency
    • found in the ear, external auditory meatus
    • eustachian tube
    • epiglottis and small cartilages of the larynx
  11. types of elastic cartilage
    epiglottis, corniculates, cuneiforms
  12. fibrous
    intervertebral discs of the vertebral column
  13. supportive framework of the larynx
    musculo-cartilaginous structure located at the superior end of the trachea
  14. what are the laryngeal joints
    • cricoarytnoid-saddle joint that permist rocking motion and limited amount of gliding action. produces up and out swinging motion of the vocal process during abduction and in and down swinging motion when vocal process adducted. attached via the posterior cricoarytenoid ligament.
    • cricothyroid joint-a pivot joint results in rotational or gliding motion, places vocal folds under increased tension which causes an increase in the pitch of the voice, attached via a capsular ligament-pos, lat, ant ceratocricoid ligaments
  15. extrinsic and intrinsic membranes
    • ex=connecting laryngeal cartilages with adjacent structures (hyothyroid membrane and ligaments, middle hyothyroid ligament, hyoepiglottic ligament, cricotracheal membrane)
    • in=interconnect the various laryngeal cartilages and help regulate the extent and direction of their movements (conus elasticus, quadrangular membranes
  16. suprahyoid muscles
    elevators (extrinsic muscles with one attachment to the structures outside of the larynx,, important for the structure of the larynx and fixing the position of larynx
  17. infrahyoid muscles
    depressors (intrinsic, have both attachments in the larynx, important for the control of sound production
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2013-02-02 06:48:25
Anato physio

anatom physio quiz 3
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