The Skull

Unit 4

Which bones make up the cranium?

frontal, occipital, sphenoid, ethmoid, parietal, and temporal

which bones of the cranium are paired (2 on each side)?

parietal and temporal

A

nasal

B

lacrimal

C

inferior nasal conchae

D

maxilla

E

mandible

F

vomer

G

zygomatic

H

palatine

the unpaired bones of face include:

vomer and mandible

What are the bones of the face?

nasal, maxillae, zygomatic, lacrimal, palatine, inferior nasal conchae, vomer, and mandible

how many bones associated w/ the face?

14

how many bones form the cranium

8

how many total bones of the skull?

22

A

frontal

B

sphenoid

C

parietal

D

temporal

E

occipital

F

mastoid process

G

external acoustic meatus

H

styloid process

I

zygomatic process of temporal bone

J

ethmoid

4 major sutures of the skull include:

coronal, sagittal, squamosal, and lamboidal

the coronal suture separates which two bones

frontal and parietal (2)

the squamosal suture separates which bones

parietal (2) and temporal

the sagittal suture separates which bones

the parietal bones

the lamboidal suture separates which bones

occipital and parietal (2)

which suture is highlighted here

squamosal

which suture is highlighted here

coronal

which suture is highlighted here

sagittal

which suture is highlighted here

lamboidal

A

palatine processes

B

horizontal plate

C

occipital condyles

D

mandibular fossa

E

styloid process

F

mastoid process

G

external occipital protuberence

H

foramen magnum

I

stylomastoid foramen

J

carotid canal

K

lateral pterygoid plate

L

medial pterygoid plate

soft fibrous areas where several sutures unite

fontanelles

fontanelles are important aspect of infant skulls b/c they allow for

molding and bone modeling

the only non-fused mobile bone of the skull is the

mandible

the temporal process of the zygomatic bone and the zygomatic process of the temporal bone make up the

zygomatic arch

the arrow is pointing to what feature

supra-orbital notch (foramen)

what does the green line point to

optic canal

what does the black arrow point to

superior orbital fissure

A

cribriform foramina of the cribriform plate

B

perpendicular plate

C

middle nasal concha

D

perpendicular plate of ethmoid bone

E

crista galli

F

superior nasal concha

the top arrow points to

infra-orbital foramen

the bottom arrow points to

alveolar process

A

frontal sinus

B

ethmoid sinus

C

sphenoid sinus

D

maxillary sinus

how many paranasal sinuses are there?

4

what are the four paranasal sinuses?

frontal, sphenoid, ethmoid, and maxillary

the hard palate of the mouth is formed by:

palatine process of the maxillae and horizontal plates of the palatine bones

what bone is being pointed to?

nasal

what bone is this

lacrimal

how many bones make up the orbit

7

the orbit is aka

eye socket

Many Friendly Zebras Enjoy Lazy Summer Picnics (orbit)

maxillary, frontal, zygomatic, ethmoid, lacrimal, sphenoid, palatine

pink

frontal bone

orange

ethmoid bone

red

lacrimal bone

purple

palatine bone

blue

maxilla

green

zygomatic

yellow

sphenoid

what is this arrow pointing to?

inferior nasal concha

what is the arrow pointing to?

vomer

the nasal septum is composed of

perpendicular plate of the ethmoid bone, vomer bone, septal cartilage

blue

septal cartilage

green

perpendicular plate of ethmoid bone

pink

vomer

what is this structure

nasal septum

which bone is highlighted

hyoid

the hyoid bone has a greater and lesser

horn

orange

coronoid process

yellow

condylar process (TMJ)

red

ramus

brown

angle

dark blue

mandibular foramen

purple

mental foramen

light blue

mental n.

pink

alveolar processes

defining features on the medial side of the mandible are called the

mylohyoid line and submandibular fossa