Nose and Sinuses Flashcards
Projects from the face and Vary in size and shape bec of differences in nasal cartilage
ExternalNose
Parts of external nose
1. Root 2] Apex 3] Nares 4] Alae 5] Nasal septum 6] Vestibule
superior angle of external nose
Root
tip of external nose
apex
has 2 piriform openings
nares
lateral boundaries
alae
middle struc w/c separates 2 nares
nasal septum
w/ stiff hairs
vestibule
Skeletalpart of nose
Nasal bones
Frontal proc of maxillae
Nasal part of frontal bone
Cartilaginous Part
2 Lateral cartilage
2 Alar cartilage
1 Septal cartilage
Divides the chamber of the nose into 2 nasal cavities
Nasal Septum
Components of nasal septum
1] Perpendicular plate of ethmoid
2] Vomer
3] Septal cartilage
forms superior part of the nasal septum
1] Perpendicular plate of ethmoid
thin flat bone
2] Vome
articulates w/ bony septum
septal cartilage
Open posteriorly into the nasopharynx thru the choanae
Nasal cavity
TRUE OR FALSE
Mucosa lines the NC except for vestibule
tRUE
2 AREAS OF NASAL CAVITY
1] Olfactory area
2] Respiratory area
superior 1/3 AND contains organ of smell
1] Olfactory area
-inferior 2/3 where air is warmed and moistened before it goes to resp tract
2] Respiratory area
3 scroll-shaped elevations
Superior,middle,inferior
Divide the nasal cavity into 4 passage
Nasal Concha
4 nasal passages of nasal cavity
1] Sphenoethmoidal recess
2] Superior meatus
3] Middle meatus
4] Inferior meatus
sphenoidal sinus
Sphenoethmoidal recess
-posterior ethmoidal sinus
Superior meatus
anterior/middle ethmoidal sinus
- frontal sinus
- maxillary sinus
Middle meatus
-nasolacrimal duct
Inferior meatus
Arterial Supply of the Nose
Branches of:
- 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