facial bones Flashcards
how many facial bones in the face
14
what does the maxilla form
- upper jaw
- anterior part of roof of mouth
- lateral walls of nasal cavity
- part of floor of orbital
- most of hard palate
where does zygomatic bone originate from
two bones that fuse before birth
what do the zygomatic bones form
the prominence the cheeks and part of lateral walls of cavities
shape of palatine bones
two small L-shaped bones
what do the horizontal parts of palatine bones form
- unite to form posterior part of hard palate
what do perpendicular parts of palatine bones form
- project upwards to form part of lateral walls of nasal cavity
what do palatine bones of upper extremities form
- form part of orbital cavities
what kind of bone is the vomer bone
a thin flat bone
where does the vomer bone extend to and was does it form
- it extends upwards from the middle of the hard palate
- forms most of inferior part of nasal septum
vomer bone superior articulation
perpendicular plate of ethmoid bone
vomer bone anterior articulation
vomer bone is in the midline resting on sphenoid bone
what does the vomer bone contribute to the formation of?
bony nasal septum separating two conchae
what is the inferior nasal conchae?
one of three paired nasal conchae in the nose
what does the nasal conchae form and project into?
- forms part of lateral wall of nasal cavity
- projects into it below middle concha
what is bone is the superior and middle conchae apart of?
ethmoid bone
function of conchae
- collectively increase SA in nasal cavity
- allows inspired air to be warmed and humidified more effectively
the smallest bones of the face
lacrimal bones
how many lacrimal bones are there and where are they located
- 2
- posterior and lateral to nasal bones
- they enclose eye balls
what do lacrimal bones form
- forms medial walls of orbital cavity
lacrimal sac function
- a structure that gathers tears and passes them into nasal cavity
what houses the lacrimal sac
lacrimal fossa that fuses with maxilla
how many nasal bones are there and what do they form?
- 2
- form greater part of lateral and superior surfaces of bridge of nose
what do paired nasal bones articulate with?
- articulate with each other in midline
- frontal bone superiorly
