respiratory system final Flashcards
upper respiratory tract is composed of
nose and nasal cavity, paranasal sinuses, pharynx, structures associated with the above
nose
the main conducting airway for inhaled air
another name for nostrils
external nares
roof of the nasal cavity is formed by
frontal bones, nasal bones, cribriform plate of the ethmoid, sphenoid bone
the floor of the nasal cavity is formed by
horizontal plate of the maxillae, horizontal portions of the palatine bones
vestibule
anterior region of the nasal cavity, near the nostrils
vibrissae
coarse hairs near the vestibule used to trap large particles
nasal septum
divides the nasal cavity into left and right portions
what forms the nasal septum
septal cartilage, perpendicular plate of the ethmoid, vomer bone
another name for conchae
turbinates
nasal cycle
alternating inactivation of one side of the nose
paranasal sinuses
paired air spaces in the skull
What are the paranasal sinuses
frontal, ethmoidal, sphenoidal, maxillary
pharynx
common space used by both the respiratory and digestive systems
nasopharynx
superiormost region of the pharynx, lined with ciliated epithelium
auditory tubes
in the lateral walls of the nasopharynx and connect the nasopharynx to the middle ear so air pressure can be equalized behind the ear drum
pharyngeal tonsil
in the posterior nasopharynx, commonly called the adenoids
oropharynx
the middle pharyngeal region, is immediately posterior to the oral cavity
What passes through the oropharynx
both food and air
palatine tonsils
on the lateral wall of the oropharynx. the ones you can see in the mirror
lingual tonsils
at the base of the tongue
laryngopharynx
inferior, narrowed region of the pharynx. extends inferiorly from the hyoid bone and is continuous with the larynx and esophagus
Lower respiratory tract is made up of
larynx, trachea, bronchi, bronchioles, and associated structures
Another name for larynx
voice box
larynx
a short, somewhat cylindrical airway that is bounded superiorly by the laryngopharynx and posteriorly by the esophagus and inferiorly by the trachea
functions of the larynx
passageway for air, prevent swallowed materials from entering the lower respiratory tract, sounds of speech, increases pressure in the abdominal cavity
valsalva maneuver
the epiglottis closes over the larynx so air cannot escape; simultaneously abdominal muscles contract to increase abdominal pressure