Skeletal System

Front 1

Cranial Bones

Back 1

Protect the brain

Front 2

Frontal Bones (2)

Back 2

Forehead and eyebrows

Front 3

Parietal Bones (2)

Back 3

Both sides of the cranium- meet in the middle

Front 4

Temporal Bones (2)

Back 4

Just inferior to the parietal bones- temples, above our ears

Front 5

Occipital Bone

Back 5

Posterior bone of the cranium, which forms floor and back of skull

Front 6

Sphenoid Bone

Back 6

Butterfly shaped bone that spans the width of the skull, hold yours brain

Front 7

Facial Bones

Back 7

House our eyes, allows us to chew and is the base for our nose

Front 8

Maxillae (Maxillary Bones) (2)

Back 8

Form the upper jaw, mustache area & sinuses

Front 9

Palatine Bones (2)

Back 9

Form the palate, failure of these bones to fuse together causes a cleft palate

Front 10

Zygomatic Bones (2)

Back 10

Form the cheek bones and extend up to the lateral eye sockets

Front 11

Lacrimal Bones (2)

Back 11

Small bones that form the medial wall of the eye socket where tears come out of

Front 12

Nasal Bones (2)

Back 12

Form together to create the bridge of the nose

Front 13

Mandible

Back 13

The large bone that forms the jaw- largest and strongest bone in the face

Front 14

Jaw

Back 14

Only free moving joint in the skull

Front 15

Hyoid Bone

Back 15

-not truly part of the skull

-horse shoe shaped bone in the throat

-suspended by ligaments above the larynx

-only bone to not articulate with another bone in the body

Front 16

Spine

Back 16

-Body's axial support

-Formed by 26 bones connected by ligaments

Front 17

Cervical Spine

Back 17

7 vertebrae labeled c1-c7

Front 18

C1

Back 18

Called the atlas, which allows you to nod your head yes

Front 19

C2

Back 19

Called the axis, which allows you to shake your head no

Front 20

Thoracic Spine

Back 20

12 vertebrae labeled t1-t12. Articulates with each rib

Front 21

Lumbar Spine

Back 21

5 vertebrae labeled L1-L5

Front 22

Sacrum

Back 22

-Formed by 5 different vertebrae fused together

-Articulates with L5, making the lumbosacral joint

-Articulates with the pelvis, making the sacroilliac

Front 23

Coccyx

Back 23

Most inferior aspect of the spine, made by the fusion of 3 small bones

Front 24

Intervertebral Disks

Back 24

-Pads of flexible cartilage that absorb shock and allow flexibility

-90% water and very gel like

-As we age, the water decreases, leaving the disks more ridged and making us shorter