Bones of the Axial Skeleton

Question 1

Coronal Suture

Answer 1

Running in the coronal plane, occurs anteriorly where the parietal bones meet the frontal bone.

Question 2

Squamous Suture

Answer 2

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

Question 3

Sagittal Suture

Answer 3

occurs where the right and left parietal bones meet superiorly in the midline of the cranium.

Question 4

Lambdoid Suture

Answer 4

occurs where the parietal bones meet the occipital bone posteriorly.

Question 5

Anterior cranial fossa

Answer 5

holds the large front lobes of the brain

Question 6

Frontal Bone

Answer 6

forms the forehead and the roofs of the orbits

Question 7

Parietal bone

Answer 7

Forms most of the superior and lateral aspects of the skull

Question 8

Occipital bone

Answer 8

Forms posterior aspect and most of the base of the skull

Question 9

Occipital condyles

Answer 9

articulate with the atlas (first vertebra)

Question 10

Foramen Magnum

Answer 10

allows passage of the spinal cord from the brain stem to the vertebral canal

Question 11

External occipital protuberance

Answer 11

site of muscle of attachments

Question 12

Temporal bone

Answer 12

Forms inferolateral aspects of the skull and contributes to the middle cranial fossa; has squamous, tympanic, an petrous parts.

Question 13

Styloid process

Answer 13

attachment site for several neck and tongue muscles and for a ligament to the hyoid bone.

Question 14

Mastoid process

Answer 14

attachment site for several neck muscles

Question 15

External acoustic meatus

Answer 15

canal leading from the external ear to the eardrum

Question 16

Zygomatic process

Answer 16

contributes to the zygomatic arch, which forms the prominence of the cheek.

Question 17

Sphenoid bone

Answer 17

Keystone of the cranium; contributes to the middle cranial fossa and orbites; main parts are the body, greater wings, lesser wings, and pterygoid processes.

Question 18

Optic Canals

Answer 18

Passageway for cranial nerve II and the ophthalmic arteries

Question 19

Superior orbital fissures

Answer 19

Passageway for cranial nerves III, IV, VI, part of V, and ophthalmic vein.

Question 20

Sella Turcica

Answer 20

the seat for the pituitary gland.

Question 21

Ethmoid bone

Answer 21

Small contribution to the anterior cranial fossa; forms part of the nasal septum and the lateral walls and roof of the nasal cavity; contributes to the medial wall of the orbit.

Question 22

Cribriform plates

Answer 22

passageway for filaments of the olfactory nerves

Question 23

Crista galli

Answer 23

attachment point for the falx cerebri, dural membrane fold.

Question 24

Vomer

Answer 24

Inferior part of the nasal septum

Question 25

Maxilla

Answer 25

Keystone bones of the face; form the upper jaw and parts of the hard palate, orbits, and nasal cavity walls

Question 26

Inferior Nasal Conchae

Answer 26

from part of the lateral walls of the nasal cavity

Question 27

Frontal process

Answer 27

forms part of lateral aspect of bridge of nose

Question 28

Alveoli

Answer 28

Sockets of teeth

Question 29

Palatine

Answer 29

forms the anterior hard plate and a small part of nasal cavity and orbit walls

Question 30

Zygomatic

Answer 30

Form the cheek and part of the orbit

Question 31

Nasal

Answer 31

Form the bridge of the nose

Question 32

Lacrimal

Answer 32

Form part of the medial orbit wall

Question 33

Mandible

Answer 33

The lower jaw

Question 34

Hyoid

Answer 34

lies just inferior to the mandible in the anterior neck.

Question 35

Jugular foramen

Answer 35

passageway for the internal jugular vein and cranial nerves.

Question 36

Inferior Orbital Fissure

Answer 36

Passageway for maxillary branch of cranial nerve V, the zygomatic nerve, and blood vessel.

Question 37

Pedicle

Answer 37

are short,, bony walls that project posteriorly from the vertebral body and form the sides of the arch.

Question 38

Transverse Foramen

Answer 38

vertebral blood vessels pass through this hole in each transverse process

Question 39

C1

Answer 39

lacks a body and a spinous process

Question 40

C2

Answer 40

has a body and a spinous process, and other typical vertebral processes.

Question 41

Transverse Costal Facets

Answer 41

these articulate with the tubercles of the ribs

Question 42

Superior Costal Facet

Answer 42

lies at the superior edge

Question 43

Inferior Costal Facet

Answer 43

lies at the inferior edge

Question 44

Sacrum

Answer 44

shapes the posterior wall of the pelvis

Question 45

Coccyx

Answer 45

Or tailbone, is a small and triangular.

Question 46

Sternum

Answer 46

lies in the anterior midline of the thorax

Question 47

Manubrium,

Answer 47

the superior section, is shaped like the knot in a necktie of the sternum

Question 48

Body

Answer 48

or mid-portion, makes up the bulk of the sternum

Question 49

Xiphoid process

Answer 49

forms the inferior end of the sternum

Question 50

Ribs

Answer 50

There are 12 pairs that form the flaring sides of the thoracic cage.

Question 51

Clavicles

Answer 51

or collarbones, are slender, S-shaped bones that extend horizontally across the superior thorax on the anterior surface.

Question 52

Scapula

Answer 52

Or shoulder blades, are thin, triangular flat bones located on the dorsal surface of the rib cage, between rib 2 superiorly and rib 7 inferiorly.

Question 53

Glenoid Cavity

Answer 53

This cavity articulates with the humerus, forming the shoulder joint

Question 54

Acromion

Answer 54

Articulates with the acromial end of the clavicle

Question 55

Coracoid Process

Answer 55

projects anteriorly from the lateral part of the superior scapular border.

Question 56

Supraspinous and Infraspinous Fossa

Answer 56

lie superior and inferior to the scapular spine

Question 57

Subscapular Fossa

Answer 57

is the shallow concavity formed by the entire anterior surface of the scapula.

Question 58

Humerus

Answer 58

is the only bone of the arm.

Question 59

Radius

Answer 59

is thin at its proximal end and widened at its distal end--the opposite of the ulna

Question 60

Ulna

Answer 60

slightly longer than the radius, is the main bone forming the elbow joint with the humerus.