Skull bones - Littlemiamischools.org
Download
Report
Transcript Skull bones - Littlemiamischools.org
Frontal
Parietal
Occipital
Temporal
233 left
Forehead: folds in to
make part of eye orbit
supraorbital
notch/foramen- above
eye: for nerves to face
232 left
Behind frontal
Form top sides of
cranial cavity
233 right
Back of skull/base
of cranium
Large opening in
lower surface=
foramen magnum
Occiptal condyleson either side of
f.m. articulate with
atlas
233 right
Condylar canals- small
foramens on either
side of foramen
magnum
External occipital
protuberanceposterior projectionfelt as bump
Superior nuchal linecurved ridge extending
laterally from
e.o.protuberance
232 right
Joins parietal bone on side:
contains external auditory
meatus-leads to inner earbelow this is :
Mastoid process –behind
ear, attachment for neck
muscles
Styloid process- pointed –
anchors muscles of tongue
& pharynx
Has zygomatic processjoins zygomatic bone, helps
form prominence of cheek
• Jugular
foramen
- entrance
for cranial
nerves
Sagittal: separates left
and right parietal
bones
Coronal: separates
frontal from parietal
bones (like coronal
plane)
Lambdoid: separates
occipital from parietal
bones
242
Has fontanels– fibrous
membranes connecting
the cranial bones =
“soft spots”
Enables head to pass
through birth canal
Allows rapid growth of
brain
Close/calcify as cranial
bones grow
234
Between temporal and
zygomatic bones;
looks like a bat
Greater wing: on each
side, back wall of orbit
Lesser wing: 2 inside,
posterior roof of eye
orbit
234
Pterygoid processes:
plates that border back
opening of nasal
cavities
Foramen rotundum:
opening in greater
wing for cranial nerve
235
Anterior to sphenoidsmall
◦ Cribiform plate: roof of
nasal cavity
237 top left
Cheek bones
◦ Zygomatic arch= prominence that connects
zygomatic to temporal bone
Maxillae
Lower face/upper jawparts of these form
hard palate, Contain
sockets of teeth
◦ Palatine processes form
roof of mouth– if
incomplete = cleft palate
◦ Infraorbital foramentransmits vessels and
nerves
236 bottom
236 bottom
237 bottom
right
2 bones form bridge of
nose
Gives shape to the
nose
Back of roof of mouth
Irregular
Lateral walls of nasal
cavity
236 top
Thin, flat, along
midline within the
nasal cavity
Posterior part of
septum
Thin, delicate plates in
nasal cavity
3 sets in each cavity:
top, middle, bottom
Make narrow passage
airways to filter dust
237
bottom left
Between ethmoid and
maxilla
Forms part of orbit
(eye socket)
Smallest bone of face
Lacrimal fossa: hole
that drains tear ducts
238
Mental foramen- opening
dentists use to inject
anesthetics
Ramus- process that
projects up from posterior
of body
Body- main part- forms
chin
Symphysis menti- ridge
beneath teeth
Mandibular foramen- inside
of ramus
process
Orbit: eye socket
Sinuses: mucous-lined,
air-filled spaces
Fontanelle: soft spots
of baby’s skull