Axial Skeleton

Question 1

How many bones are in the adult skeleton?

Answer 1

206

Question 2

Axial Skeleton

Answer 2

80 bones

Question 3

Cranial Bones

Answer 3

11
form the cranial cavity

Question 4

Facial Bones

Answer 4

14
form the face

Question 5

Frontal Bone

Answer 5

forms forehead, roof of the eyes socket (supraorbital foramen), and most of the cranial floor
frontal sinuses lie deep within the bone
nerves are threaded through eyebrows, eyelids and msucles

Question 6

Parietal Bone

Answer 6

form the sides and the roof of the cranial
held together by sagittal sutures, also seperated on the top of the skull by coronal suture

Question 7

Temporal Bone

Answer 7

form lower sides of the cranium and part of the cranial floor
external auditory meatus (ear canal) is located within these bones
styloid process
attachment point for tongue muscles
mastoid process - attachment point for neck muscles
sqaumous structure

Question 8

Occiptial Bone

Answer 8

forms posterior part and most of the cranial base
foramen magnum passes through this bone
occiptal condyles are on either side of foramen magnum that connect within the first vertebrae

Question 9

Sphenoid Bone

Answer 9

butterfly bone or “keystone of the skull”
sella turcica - depression in the sphenoid that the peituitary gland

Question 10

Ethomoid Bone

Answer 10

found in directly above the sphenoid
crista galli - holds the membrane that surrounds the brain (dura mater)

Question 11

Cranium

Answer 11

8 cranial bones
14 facial bones

Question 12

Suture

Answer 12

immovable joint

Question 13

Vertebral Column

Answer 13

underneath skull to tail bone
33 bones

Question 14

Cervical Vertebrae

Answer 14

7
only ones to have transverse foramen, most with bifurcated spinous process
bi - two
contains c1 and c2

Question 15

Thoracic Vertebrae

Answer 15

12
form thoracic cage (rib cage)

Question 16

Lumbar Vertebrae

Answer 16

5
vertebrae that are the most weight baring

Question 17

Sacrum

Answer 17

5 fused bones

Question 18

Coccyx

Answer 18

4 fused bones, attachment point for ligaments

Question 19

Nasal Bones (2)

Answer 19

form the bridge of nose, remaining portion of nose is made up of cartilage

Question 20

Maxilla Bones (2)

Answer 20

upper jaw, connected w/ every other facial bone except mandible
helps form the roof of mouth along with palatine bone
aveolar process - making for teeth sockets

Question 21

Lacrimal Bones (2)

Answer 21

smallest, has openings (tear ducts)

Question 22

Zygomatic Bones (2)

Answer 22

form cheekbone, connects w frontal, maxilla, sphenoid, and temporal

Question 23

Inferior Nasal Conchae (2)

Answer 23

lined w/ mucus membrane to capture pollutants/bacteria
“air filters”

Question 24

Vomer

Answer 24

directly center in nose
helps shape nasal septum

Question 25

Mandible

Answer 25

lower jaw bone
largest facial bone
only moveable skull bone
helps form a joint (TMJ joint)

Question 26

Palatine (2)

Answer 26

posterior end of upper palate
together w/ maxilla form hard palate

Question 27

C1

Answer 27

atlas
supports head, gives us the ability to nod “yes”, no vertebral body, all cervical have transverse foramen

Question 28

C2

Answer 28

axis
dens (fit inside the c2)
gives us the ability to shake head “no”

Question 29

Scoliosis

Answer 29

sideway bending, seen in adolescent girls

Question 30

Kyphosis

Answer 30

“hunch back” results from osteoporosis, vertebrae injury

Question 31

Lordosis

Answer 31

inward curve of spine, usually in lumbar area