Anatomy: Cranial Bones And Mandible

Front 1

The cranium bone is composed of ______ large flat bones.
List all of these bones.

Back 1

8
Frontal
Parietal (2)
Temporal (2)
Occcipital
Sphenoid
Ethmoid

Front 2

What do the parietal bones form?

Back 2

the superior and lateral walls of the cranium,
the coronal suture with the frontal bone

Front 3

Where are the parietal bones located?

Back 3

they meet at the sagital suture (midline of the skull)

Front 4

What does the frontal bone form?

Back 4

the forehead
the bony projections underneath the eyebrows
the superior part of the eye's orbit

Front 5

The frontal bone contains _____________ and connects to the _______________.

Back 5

frontal sinus
nasal cavity

Front 6

Describe the formation/fusion of the frontal bone.

Back 6

grows as 2 halves
completely fused by 5 or 6

Front 7

The temporal bones are composed of ______ important bone making processes.
List all of these processes.

Back 7

5
external acoustic (auditory) meatus
styloid
zygomatic
mastoid
jugular

Front 8

Where are the temporal bones located?

Back 8

lies inferior to the parietal bones and join he at the squamous sutures

Front 9

External Acoustic (Auditory) Meatus

Back 9

ear canal which leads to the ear drum

Front 10

Styloid Process

Back 10

needle-like projection used to attach tendons for neck muscles (just below acoustic meatus)

Front 11

Zygomatic Process

Back 11

thin bridge of the bone joins the cheekbone (zygomatic bone)

Front 12

Mastoid Process

Back 12

rough projection and inferior to the auditory meatus, full of air cavities, close to inner ear, can cause ear infection

Front 13

Jugular Foramen

Back 13

at the function of the occipital and temporal bone, juldi vein passes here, next to the internal acoustic meatus and the carotid canal

Front 14

What does the occipital bone form?

Back 14

the floor and back of the skull

Front 15

Where is the occipital bone located?

Back 15

joins the parietal bone at the lambdoid suture
occipital clondyles rest on the vertebrae

Front 16

Where is the forman magnum?
What does it do?

Back 16

located at the base of the occipital bone,
allows the spinal cord to exit the brain

Front 17

The sphenoid bone is ______________ shaped.

Back 17

butterfly

Front 18

Where is the sphenoid bone?

Back 18

it's part of the bottom of the cranium

Front 19

The seila turcica (turk's saddle) holds ______________ and is part of the ______________ bone.

Back 19

pituitary gland
sphenoid

Front 20

The forman evale is part of the __________ bone. What does it do?

Back 20

Sphenoid
allows nerves to pass to the chewing muscle

Front 21

What does the Sphenoid bone form?

Back 21

forms part of the eye orbital and has two openings
1. optic canal
2. superior orbital tissue

Front 22

Optic canal

Back 22

allows the optic nerve to pass through

Front 23

superior orbital tissue

Back 23

allows nerved to pass to control eye movements

Front 24

The ethmoid bone is __________ shaped.

Back 24

irregularly

Front 25

Where is the ethmoid bone located?

Back 25

anterior to the sphenoid bone
it is the roof of the nasal cavity
it is part of the medial walls of the eye orbital

Front 26

What does the ethmoid bone form?

Back 26

the superior and turbulence of air flow

Front 27

What is the crista galli (cock's comb) and where does it attach?

Back 27

the outermost portion of the brain
the ethmoid bone

Front 28

(Ethmoid)
Cribriform plates allow....

Back 28

nerve fibers from the nose to pass to the brain

Front 29

There are _______ facial bones.
> not in contact with the brain
>provide shape of the face
Name the bones.

Back 29

14
maxilla
palatine
zygomatic
lacrimal
nasal
inferior nasal concha
fragile bone
vomer

Front 30

Mandible

Back 30

> the lower jaw
> attached to the skull by the temporomandibular articulation
> only moveable bone of the skull
> the body is horseshoe shaped front and lateral side
> 2 rami extend vertically from the posterior position of the body, and is part of the attachment site for muscles