Bone Anatomy: Axial Skeleton

Question 1

Total number of bones in the axial skeleton

Answer 1

80 bones

Question 2

Total number of bones in the skull

Answer 2

22 bones [8 acts as the braincase, 14 are facial bones]

Question 3

Total number of bones in the auditory ossicles

Answer 3

6 bones

Question 4

Total number of bones in the vertebral column

Answer 4

22 bones [7 in the cervical vertebrae, 12 in the thoracic vertebrae, 5 in the lumbar vertebrae, the other 2 being the sacrum and the coccyx]

Question 5

Total bones in the thoracic cage

Answer 5

25 bones [24 consists the ribs, the other 1 is the sternum which is comprised of 3 parts]

Question 6

Alternate name for the braincase or skull

Answer 6

Neurocranium

Question 7

It encloses the cranial cavity; covers and protects the fragile brain tissue

Answer 7

Skull, braincase, neurocranium

Question 8

The parietal and lateral walls of the cranium; coronal suture

Answer 8

Parietal bone (paired)

Question 9

Lies inferior to the parietal bone; squamous suture

Answer 9

Temporal bone (paired)

Question 10

Forehead, bony projections under the eyebrow, part of the eye’s orbit

Answer 10

Frontal bone

Question 11

Inferior and posterior bone of the cranium; lambdoid suture

Answer 11

Occipital bone

Question 12

Butterfly-shaped bone that spans the width of the skull

Answer 12

Sphenoid

Question 13

Irregularly shaped bone that lies anterior to the sphenoid bone

Answer 13

Ethmoid

Question 14

Alternate name for the facial bones

Answer 14

Viscerocranium

Question 15

It consists of 14 bones; 13 solidly connected, 1 movable (mandible). It holds the facial muscles in place. It is joined together by sutures (interlocking, immovable)

Answer 15

Facial bones, Viscerocranium

Question 16

Upper jaw, main bones of the face; carries the upper teeth

Answer 16

Maxillae bones (2)

Question 17

Lies posterior to the palatine provesses of the maxilla

Answer 17

Palatine bones (2)

Question 18

Cheekbones

Answer 18

Zygomatic bones (2)

Question 19

Bones forming part of the medial wall of each orbit

Answer 19

Lacrimal bones (2)

Question 20

Bones forming the bridge of the bone

Answer 20

Nasal bones (2)

Question 21

Thin curved bones projecting from the lateral wall of the nasal cavity

Answer 21

Inferior Nasal Conchae (2)

Question 22

Single jone in the median of the nasal cavity

Answer 22

Vomer bone

Question 23

Lower jaw: only freely movable joint of the face

Answer 23

Mandible

Question 24

Unpaired, U-shaped bone; not part of the skull & has no direct bong attachment to the skull or any other bones.

Provides attachment to tongue muscles; elevates the larynx during speech and swallowing

Answer 24

Hyoid bone

Question 25

form a flexible, bony bridge that transmits vibrations

Answer 25

Auditory Ossicles

Question 26

3 parts of the auditory ossicles

Answer 26

Malleus (hammer), Incus (anvil), Stapes (stirrup)

Question 27

Central axis of the skeleton, consists of 26 individual bones, has 5 regions

Answer 27

Vertebral Column

Question 28

C1-C7, curved anteriorly very small bodies (except atlas)

Answer 28

Cervical vertebrae bones

Question 29

Bone in the cervical vertebrae which hold the head, allows head to move up and down

Answer 29

Atlas

Question 30

Bone in the cervical vertebrae that allows for rotation to occur, and lets the head to move left to right

Answer 30

Axis

Question 31

T1-T12, curved posteriorly ``` long, thin spinous processes extra facets (because of the ribs) ```

Answer 31

Thoracic vertebrae bones

Question 32

L1-L5; curved anteriorly large, thick bodies & heavy, rectangular transverse & spinous process

Answer 32

Lumbar vertebrae bones

Question 33

The other 2 bones in the vertebral column

Answer 33

Sacrum (S1-S5) & Coccyx

Question 34

It protects the vital organs within the thorax. It prevents the collapse of the thorax during respiration.

Answer 34

Rib cage

Question 35

How many pairs of ribs does a normal person have?

Answer 35

12 pairs [1-7 true ribs, 8-12 false ribs, 11-12 floating ribs)

Question 36

Ribs that are attached directly to the sternum

Answer 36

True ribs (1-7)

Question 37

Ribs that do not attach directly to the sternum

Answer 37

False ribs (8-12)

Question 38

Ribs that do not attach to the sternum

Answer 38

Floating ribs (11-12)

Question 39

Breastbone, resembles a sword, is divided into three parts

Answer 39

Sternum

Question 40

Three parts of the sternum

Answer 40

Manubrium Body Xiphoid process

Question 41

A depression bet, the ends of the clavicles where they articulate with the sternum

Answer 41

Jugular notch

Question 42

A slight elevation felt at the junction of the manubrium and the sternum; important landmark because it identifies the 2nd rib

Answer 42

Sternal angle

Question 43

The most superior part of the sternum and has a trapezoid shaoe

Answer 43

Manubrium

Question 44

The largest part of the sternum, its shape is flat and elongated

Answer 44

Body of the sternum

Question 45

The smallest and most inferior part of the sternum

Answer 45

Xiphoid process