Skull Marking

Question 1

what bones are the skull composed of

Answer 1

8 cranial bones
14 facial bones

Question 2

fontanelles

Answer 2

formed from fibrous membranes located between unfused skull bones in newborns; gives skull flexibilty and for rapid growth

Question 3

anterior fontanelles

Answer 3

located where frontal and parietal bones meet

Question 4

posterior fontanelle

Answer 4

located where the occipital bone and two parietal bones meet

Question 5

sphenoid fontanelle

Answer 5

located where the frontal bone, temporal bone, anterior tip of the parietal bone, and the greater wing of the sphenoid bone meet

Question 6

mastoid fontanelle

Answer 6

located where the occipital, parietal, and temporal bones meet

Question 7

sutures

Answer 7

immovable joints formed between most articulating bones of the adult skull; example of improper suture formation is cleft palate

Question 8

coronal suture

Answer 8

between frontal and parietal bones

Question 9

sagittal suture

Answer 9

between two parietal bones

Question 10

lambdoid suture

Answer 10

between parietal and occipital bone

Question 11

squamous suture

Answer 11

between the temporal and parietal bones

Question 12

intermaxillary suture

Answer 12

between the two maxillary bones

Question 13

temporal process

Answer 13

a process on the zygomatic bone that articulates with the zygomatic process of the temporal bone

Question 14

zygomatic process

Answer 14

a slender process on the temporal bone forming part of the zygomatic arch where it articulates with the zygomatic bone

Question 15

external acoustic meatus

Answer 15

opening to the auditory canal of the ear; located on temporal bone

Question 16

external occipital protuberance

Answer 16

palpable midline projection on the occipital bone

Question 17

temporal lines

Answer 17

slightly raised ridge across parietal and frontal bone surfaces; attachment site for temporalis muscle

Question 18

supraorbital foramina

Answer 18

openings in the frontal bone, above each orbit, which transmit the supraorbital nerve and artery

Question 19

infraorbital foramina

Answer 19

openings in the maxilla that transmits blood vessels and nerves

Question 20

optic foramina

Answer 20

round openings in sphenoid bone for cranial nerve 2 (optic nerve) to pass

Question 21

perpendicular plate of ethmoid bone

Answer 21

the inferior, medial portion of the ethmoid bone; forms the superior portion of the nasal septum

Question 22

middle nasal conchae

Answer 22

two projections of the ethmoid bone that form the middle, lateral wall of nasal cavity; the superior nasal conchae projections of the ethmoid bone are not visible from this anterior skull view

Question 23

inferior nasal conchae

Answer 23

two bones forming the inferior, lateral wall of nasal cavity