anp2 lab

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anp2 lab
2012-10-01 12:17:54
respiatory system

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  1. exteranl nares
    these are the openings connecting the nasal cavity to the outside. air passes through these openings during respiration
  2. nasal cavity
    this is the cavity within the nose and above the plalate. it is divided by the nasal sept into two passageways,. the cabvity contains the olfactory epithelium and warms, moistens, and filters the air passing through the nose.
  3. paranasal sinuses
    these are the cavities located within the skull which lighten the skull and serve as resonating chambers for speech
  4. internal nares
    these are the openings at the rear of the nasal cavity which open into the nasopharynx. air passes through these openings into the nasopharynx.
  5. pharynx
    this passageway is known as the throat. it is composed of three regions
  6. nasopharynx
    this is the portion of the pharynx superior to the soft palate. the openings of the eustachain or auditory tubes are located in this region.
  7. oropharynx
    this is the portion of the pharynx between the soft palate and the epiglotties.. it si the common passageway for the digestive and respiratory system
  8. laryngopharynx
    this portion of the pharynx lies bewteen the hyoid bone and the larynx
  9. larynx
    this structure is also called the voice box. it connects the pharynx to the trachea. the epiglotties  is a flap of tissue that covers the opeing to the larynx called the glotties during the swallowing. this epiglottis preveents food and fluid from entering the lower portion of the respiratory system.  the larynx also contains the pairted vocal chords used for speech.
  10. trachea
    this is a cartilage reenforced tube that is commonly called the windpipe. it begins at the larynx and ends as it splits into the right and left bronchi, in the thorax. it is the passageway for air
  11. lungs
    two large respiratory organs located in the thoratic cavity
  12. hilus
    commly called the root of the lung. they are located where the bronchi and blood vessels enter or leave the lung. otherwise the lungs float freely in the thoracic cavity
  13. primary bronchi
    these are the two tubes which split from the base of the trachea and enter the right and left lungs
  14. secondary bronchi
    the primary bronchi split into these smaller tubes within the lungs
  15. tertiary bronchi
    the secondary bronchi split into these smaller tubes within the lungs
  16. bronchioles
    the teriary bronchi split into these smaller tubes within the lungs. the bronchioles eventually lead to the alveoli
  17. alveoli
    these are small sacs lined with simple squamous epitheluim. they form the functional lunit of the lungs wher gas exchange occurs
  18. diaphragm
    this is a large flat skeletal muscle which separtes the thoracic and abdominal cavitie. it acts to change air pressure within the lungs during inhalation and exhalation