TOPIC 4A - BONES OF NASAL CAVITY Flashcards
the roof of the nasal cavity (dorsum nasi) consists of?
os frontale (paired) os nasale (paired)
the lateral walls of the nasal cavity consists of?
os lacrimale (paired) os zygomatica (paired) os maxilla (paired) os incisivum (paired)
the floor of the nasal cavity consists of?
os palatinum (paired) os maxilla (paired) os incisivum (paired) unpaired vomer
what separates the nasal and cranial cavity?
lamina cribrosa of ethmoid bone
what divides the nasal cavity?
median septum nasale
what does the ethmoidal turbinates form?
it continues rostrally and form conchae
what does endoturbinate I form?
concha nasalis dorsalis
what does endoturbinate II form?
concha nasalis media
which concha nasalis does not come from the ethmoid bone?
concha nasalis ventralis
what provides attachment for the concha nasalis dorsalis?
crista ethmoidales on the internal surface (facies interna) of the nasal bone
where do the 2 nasal bones unite?
sutura plana
what do the proc. rostrales of the nasal bone form?
apex of nasal bones
nasoincisive notch
describe the apex for relevant species
Eq,Su,Ov - end centrally
Ca - ends laterally
Bo - separate apex for each bone
What does the proc. septalis form in Ca?
part of the nasal septum
what is between the nasal and incisive bones?
incisura nasoincisiva
what are the paired frontal bones united by?
sutura interfrontalis
what does the frontal bone enclose?
the frontal sinuses (number varies in species)
list the parts of the frontal bone
frontal squama
pars nasalis (extends rostr.)
pars orbitalis
pars temporalis
what structures does the frontal squama of frontal bone give?
proc. zygomaticus
fossa gl. lacrimales
proc. cornucles (Ru)
what is pars orbitales of the frontal bone perforated by?
foramen ethmoidale
what does pars temporalis of the frontal bone form?
the rostral part of fossa temporalis
what does os zygomatica participate in?
paranasal sinus system
what does os maxilla form?
maxillary sinus (paranasal sinus)
what is attached to facies nasalis of os maxilla and what allows attachment?
crista conchalis for attachment of concha nasalis ventralis
what does proc. palatinus of os maxilla form? (2)
hard palate with palatine
palatine fissure with incisive bone
what does the nasal surface of proc. palatinus of os maxilla form?
crista nasalis and vomer attaches
what does the incisive bone form?
part of the opening to the nasal cavity
roof of hard palate
what proc. does the incisive bone have?
proc. nasalis
proc. palatinus
proc. alveolar
what are the 2 lamina of the palatine bone?
lamina horizontalis
lamina perpendicularis
what does the lamina horizontalis form?
part of the hard palate
what does the lamina perpendicularis of os palatinum form?
part of the dorsal and lateral walls of meatus nasopharyngeus and choanae
Where does the vomer extend to?
extend from choanal region into nasal cavity where it attaches to crista nasalis
what does the vomer form?
sulcus septalis that surrounds the nasal septum
in which species is the crista ethmoidales 2 parts?
Eq - rostral and caudal part
what are the main endoturbinates?
endoturbinate I, II, III , IV
what are the smaller endoturbinates?
lateral and medial ones
how many main endoturbinates in Ca?
4
how many main endoturbinates in Ru?
4
how many main endoturbinates in Eq?
6
how many smaller endoturbinates in Ca?
6
how many smaller endoturbinates in Ru?
18
how many smaller endoturbinates in Eq?
25
what is endturbinate II smaller than?
endoturbinate I
in which species is the conchae nasalis dorsalis divided in two?
eq - caudal and rostral part