Structure of the airway Flashcards
what is respiration
providing oxygen to the body and removing carbon dioxide
what is inhalation
increasing size of thorax, lowering of diaphragm, negative intra-throacic pressure sucks air in, air must be warmed , filtered and humidified, raising ribs
what is exhalation
decreasing size of thorax, passive
what are the conductive passages
Nasal cavity, nasopharynx, larynx, trachea , bronchi
what type of epithelium are in the nasal cavities
pseudostratified, ciliated, columnar, interspersed with goblet cells
what are the nasal cavities held open by
bone and cartilage
what is the nasal septum
midline structure that seperates the right and left nasal cavities
what is the nasal septum made of
anteriorly cartilage, posteriorly bone
what are the boundaries of the nasal cavities
nasal septum (medial), hard and soft palates (floor), bone (roof) nasal conchae (lateral)
what is turbulence
when air is filtered, humidified and warmed
what are the 3 nasal conchae
superior, middle, inferior
what do the nasal conchae
provide turbulence and increase SA for air flow and heat exchange
what is a meatus
found under each concha, spaces between conchae,
how do the air sinuses comminucate to the nasal cavity
open up into the meati
where are the orbits found
immediately lateral to the nasal cavity
what are the 3 sinuses
maxillary sinus, ethmoidal sinus, frontal sinus