The Axial Skeleton

Front 1

Parietal bones

Back 1

Paired; make up bulk of cranium

Front 2

Coronal suture

Back 2

Occurs anteriorly where parietal bone meets frontal bone

Front 3

Squamous suture

Back 3

Occurs where each parietal bone meets a temporal bone inferiorly, on each lateral aspect

Front 4

Sagittal suture

Back 4

Where the right and left parietal bones meet the occipital bone posteriorly

Front 5

Frontal bone

Back 5

Forms the forehead and the roofs of the orbit

Front 6

Occipital bone

Back 6

Makes up posterior part of cranium

Front 7

Temporal bones

Back 7

Paired bones viewed laterally

Front 8

Sphenoid bone

Back 8

Spans the width of the cranial floor and resembles a bat with wings

Front 9

Ethmoid bone

Back 9

Most deeply situated part of skull; posterior to the nasal bones

Front 10

Mandible

Back 10

Lower jawbone

Front 11

Maxillary bones

Back 11

Upper jaw and central part of the facial skeleton

Front 12

Zygomatic bones

Back 12

Cheeckbones; each joins the zygomatic process of the temporal bone posteriorly

Front 13

Nasal bones

Back 13

Paired, rectangular, join medically to form the bridge of the nose

Front 14

Lacrimal bones

Back 14

Located in medial orbital walls

Front 15

Palatine bones

Back 15

Lie posterior to the maxillae.

Front 16

Vomer

Back 16

Lies in the nasal cavity , forms inferior part of nasal septum

Front 17

Inferior nasal conchae

Back 17

Paired; curved bones; project medically from the lateral walls of the nasal cavity

Front 18

Nasal cavity

Back 18

Constructed of bone and cartilage; the floor forms the roof of the mouth; the walls are the nasal bones

Front 19

Paranasal sinuses

Back 19

Hollow spaces surrounding the nasal cavity

Front 20

Orbits

Back 20

Cone shaped bony cavities that hold the eyes

Front 21

Cervical vertebrate

Back 21

7 vertebra, closest to skull, concave

Front 22

Thoracic

Back 22

Has 12, convex

Front 23

Lumbar

Back 23

Has 5, concave

Front 24

Sacral

Back 24

5 fused vertebrae that forms the sacrum

Front 25

Coccyx

Back 25

4 fused vertebrae

Front 26

Anterior and posterior longitudinal ligaments

Back 26

Run along the surfaces of the vertebrae; supports and prevents hyperextention of the back

Front 27

Ligamentum flavum

Back 27

Contains lamina of adjacent vertebrae; contains elastic connective tissue and is especially strong

Front 28

Intervertebral discs

Back 28

Limits expansion of nucleus pulposus when compressed; resists tension and absorbs compressive forces

Front 29

Body

Back 29

Weight bearing region

Front 30

Vertebral arch

Back 30

Forms posterior portion of vertebrae; composed of pedicles and laminae

Front 31

Pedicles

Back 31

Short, bony walls that project posteriorly from the body and form the sides of the arch

Front 32

Laminae

Back 32

Flat bony plates, complete the arch posteriorly , extending from transverse process to spinous process

Front 33

Spinous process

Back 33

Median, posterior projection

Front 34

Transverse process

Back 34

Projects laterally from each pedicle-lamina junction

Front 35

Atlas

Back 35

Lacks a body and a spinous process

Front 36

Axis

Back 36

Has a body, a spinous process, and other typical vertebral processes, has a dens