Exercise 9

Question 1

Three divisions of the axial skeleton

Answer 1

skull, vertebral column and thoracic cage

Question 2

what does the division of axial skeleton do

Answer 2

form longitudinal axis of body, protects brain, spinal cord, the heart and lungs

Question 3

what are the two divisions of the skull

Answer 3

cranium and facial

Question 4

how many bones make up the cranium

Answer 4

8

Question 5

how many bones make up the facial

Answer 5

14

Question 6

what do the cranium bones do

Answer 6

protect the brain

Question 7

what doe the facial bones do

Answer 7

support the eyes and provide attachment for facial muscles

Question 8

how is the skull put together

Answer 8

by sutures

Question 9

what are sutures

Answer 9

interlocking fibrous joints

Question 10

what is the exception to the sutures and why

Answer 10

the mandible because it is connected by freely moving joints

Question 11

name the 8 bones of the cranium

Answer 11

frontal, temporal, parietal, occipital, sphenoid and ethmoid

Question 12

how many bones make up each

Answer 12

1 frontal, 2 parietals, 2 temporals, 1 occipital, sphenoid and ethmoid.

Question 13

what is the supraorbital margin

Answer 13

thin margin of eye socket that lies beneath the eyebrows above eyes

Question 14

the frontal bone

Answer 14

forms the forehead

Question 15

parietal bone

Answer 15

form superior and lateral aspect of skull

Question 16

temporal bone

Answer 16

form inferolateral part of skull and contribute to middle cranial fossa

Question 17

Squamous part

Answer 17

inferior to squamous suture

Question 18

describe squamous part

Answer 18

located on temporal bone. wide region above the zygomatic process

Question 19

zygomatic process

Answer 19

bridge-like projection that articulate with zygomatic bone

Question 20

describe zygomatic process

Answer 20

pointy thing coming out the ear to form the cheeks

Question 21

mandibular fossa

Answer 21

inferior to zygomatic process. receive condylar process of mandible

Question 22

tympanic part

Answer 22

sorrounds the external ear opening

Question 23

external acoustic meatus

Answer 23

canal leading into midear and eardrum

Question 24

describe external meatus

Answer 24

inside your ear

Question 25

styloid process

Answer 25

needle like projection that serves as attachment point for ligaments and neck muscles

Question 26

describe styloid process

Answer 26

look like needle going into neck. Pointy thing coming out the external acoustic meatus

Question 27

petrous part

Answer 27

form a bony wedge between spehnoid and occipital bone

Question 28

juglar foramen

Answer 28

located where the petrous part joins the occipital bone

Question 29

describe juglar foramen

Answer 29

inside the brain. Lateral to faramen magnum (BIG HOLE)

Question 30

corotid canal

Answer 30

opening through which internal corotid artery pass into cranial cavity.

Question 31

describe corotid canal

Answer 31

above juglar foramen

Question 32

mastoid process

Answer 32

bump behind external acoustic meatus

Question 33

occipital bone

Answer 33

posterior aspect of skull

Question 34

foramen magnum

Answer 34

large opening; hole in base of occipital bone

Question 35

occipital condyle

Answer 35

bumpy rounded projection lateral to foramen magnum

Question 36

external occipital proruberance

Answer 36

midline prominence behind the foramen magnum

Question 37

superior nachal line

Answer 37

below and lateral to foramen magnum

Question 38

sphenoid bone

Answer 38

bat shaped described as the keystone bone of cranium

Question 39

pterygoid process

Answer 39

project below from greater wing

Question 40

superior orbital fissures

Answer 40

sits in orbits.....lateral to optic canal. opening in greater wing

Question 41

sella turcica

Answer 41

turkish saddle above body of the sphenoid bone

Question 42

optic canal

Answer 42

openings in the base in lesser wing

Question 43

ethmoid

Answer 43

anterior cranial fossa. form part of nasal septum and nasal cavity

Question 44

crista galli

Answer 44

big pointy rooster's comb superior projection

Question 45

cribriform plate

Answer 45

lateral to crita galli and little holes on the plate is the cribriform faramina

Question 46

perpendicular plate

Answer 46

big pointy inferior projection

Question 47

name the sutures

Answer 47

sagittal suture, coronal suture, squamous suture and lambdoid

Question 48

what do all the sutures have in common

Answer 48

they are located where the parietal bones articulate with eachother

Question 49

what is the sagittal suture

Answer 49

connect the 2 parietal bones

Question 50

what is the coronal suture

Answer 50

connects frontal bone to two parietals

Question 51

what is the squamous suture

Answer 51

connect parietal bones to temporal bones

Question 52

what is the lambdoid suture

Answer 52

connect occipital with 2 parietal bone