Nose and Paranasal Sinuses, Pharynx, Larynx Flashcards
thin flat bone
Vomer
forms superior part of the nasal septum
Perpendicular plate of ethmoid
articulates w/ bony septum
Septal cartilage
Divides the chamber of the nose into 2 nasal cavities:
Nasal Septum
Open posteriorly into the nasopharynx thru the choanae
Nasal Cavities
superior 1/3 and contains organ of smell
Olfactory area
inferior 2/3 where air is warmed and moistened before it goes to resp tract
Respiratory area
3 scroll-shaped elevations
Superior, middle, inferior
Divide the nasal cavity into 4 passages
Nasal Concha
Nasal bones
Frontal proc of maxillae
Nasal part of frontal bone
Skeletal part
2 Lateral cartilage
2 Alar cartilage
1 Septal cartilage
Cartilaginous Part
Superior meatus
posterior ethmoidal sinus
anterior/middle ethmoidal sinus
frontal sinus
maxillary sinus
Middle meatus
nasolacrimal duct
Inferior meatus
Nasal Arterial Supply
- Sphenopalatine artery
- Anterior and posterior ethmoidal a
- Greater palatine a
- Superior labial a
- Lateral nasal branches of facial a
anterior, where all arteries anastomose, where nose bleeding occurs
Kiesselbach’s area
Nasal Venous drainage
Sphenopalatine
facial and
ophthalmic veins
Nerve Supply of Nasal septum
Nasopalatine n
Greater palatine n
Anterior ethmoidal n
Posterior ethmoidal n
Nerve Supply of Smell
Olfactory n
Olfactory bulb forebrain
PARANASAL SINUSES
FRONTAL
ETHMOID
SPHENOID
MAXILLARY
Drains thru frontonasal duct into infundibulum w/c opens into semilunar hiatus of middle meatus
FRONTAL SINUS
FRONTAL SINUS nerve supply
br of supraorbital n
ETHMOIDAL SINUS nerve supply
Nasociliary n[CN V1]