Nasal Cavity Flashcards
External (anterior) nares- open into the nasal cavity at the vestibule
Nostrils
Internal (posterior) nares- open into the nasopharynx
Choanae
Extends from the roof to the floor; has both not & cartilaginous portions
Nasal septum
Tubinates that project from lateral walls
Conchae
Nasal cavity that continues hair follicles
Vestibule
Nasal cavity that continues the conchae
Respiratory region
Nasal cavity that contains olfactory epithelium
Olfactory region
Lining of the sphenoethmoidal recess in the apex of nasal cavity
Olfactory mucosa
Covers the rest of the nasal cavity - ciliated epithelium with numerous mucus - secreting glands
Nasal mucosa
Posterior lateral of palatine bone connecting to sphenoid bone
Sphenopalatine fossa
Sphenoethmoidal recess drains
Sphenoid paranasal sinus
Superior nasal meatus drains
Posterior ethmoid air cells
Middle nasal meatus
- ethmoid bulla (middle ethmoid air cells)
- semilunar hiatus (frontal sinus, anterior ethmoid air cells, & maxillary sinus)
Inferior nasal meatus drains
Nasolacrimal duct
Where does the anterior, middle, & posterior ethmoid air cells drain?
Anterior - middle nasal meatus
Middle - middle meatus (bulla cells) at ethmoid bulla
Posterior - superior meatus
The only sinus that drains upward (most frequently affected/problem draining it)
Maxillary sinus
Orbit connects to nasal cavity by
Nasolacrimal duct
Nasopharynx connects to nasal cavity by
Choanae
Paranasal sinuses connects to nasal cavity by
Opening into meatus
Anterior cranial fossa connects to nasal cavity by
Foramina in the cribriform plate & foramen cecum
Pterygopalatine fossa connects to nasal cavity by
Sphenopalatine foramen
Oral cavity connects to nasal cavity by
Incisive foramen
