LECTURE 7 skull

Question 1

is skull part of axial or appendicular skeleton?

Answer 1

axial skeleton

Question 2

two types of bones in skull

Answer 2

cranial bones, facial bones

Question 3

description of cranial bones of skull

Answer 3

cranium, enclose and protect brain, sutures so they help protect brain because they’re synarthroses, helps form cavities of skull, attachment for head and neck muscles (skeletal),

Question 4

description of facial bones of skull

Answer 4

framework of face, don’t surround the brain, form cavities for sense organs, opening for air and food passage, hold teeth, anchor face muscles (skeletal)

Question 5

how many cranial bones are there in the skull?

Answer 5

8

Question 6

how many facial bones are there in the skull?

Answer 6

14

Question 7

cranial bones of the skull

Answer 7

frontal, occipital, sphenoid, ethmoid, parietal (2), temporal (2)

Question 8

facial bones of the skull

Answer 8

mandible, maxillae (2), zygomatic (2), nasal (2), lacrimal (2), palatine (2), vomer, inferior nasial conchae (2)

Question 9

types of bones of the skull

Answer 9

flat bones, sutures, calvaria, floor

Question 10

description of flat bones of the skull

Answer 10

thin, flattened, some curve, spongy in the center surrounded by compact bone

Question 11

description of sutures of the skull

Answer 11

synarthrotic fibrous joint

Question 12

description of calvaria of the skull

Answer 12

skullcap; superior, lateral, posterior part of the skull

Question 13

description of floor of the skull

Answer 13

base, inferior part of the skull

Question 14

how many openings in the skull?

Answer 14

85

Question 15

what travels through the openings in the skull?

Answer 15

spinal cord, blood vessels, nerves

Question 16

examples of types of openings in the skull

Answer 16

foramina, meatus, canal, fissure, notch

Question 17

description of cranial fossae of the skull

Answer 17

created by bony ridges of cranial bones, supports and encircles the brain

Question 18

3 cranial fossae of the skull

Answer 18

anterior, middle, posterior

Question 19

description of orbits of the skull

Answer 19

contain eyes and associated structures; each made of 7 bones; “My Eyes Feel Like Pulling Some Zs”

Question 20

description of nasal cavity of the skull

Answer 20

contains olfactory receptors; made of 6 different bones; “Max’s Nose Is Very Easily Picked”

Question 21

description of middle ear of the skull

Answer 21

each contains 3 ear ossicles, formed within petrous region of temporal bone

Question 22

description of inner ear of the skull

Answer 22

each contains sensory receptors for hearing and equilibrium, within petrous region of temporal bone

Question 23

when does skull ossify?

Answer 23

late in 2nd month of development

Question 24

what two bones start as two halves then fuse together to form single bones postnatally?

Answer 24

frontal bone, mandible

Question 25

description of the growth of the skull

Answer 25

1/2 adult size by age 9 months, 3/4 adult size by age 2, 100% adult size by age 8-9, face enlarges between ages 6-13 (because of the development of adult teeth)

Question 26

description of fontanels

Answer 26

unossified membranes between bones on fetal skull, mostly replaced with bone after first year, always located where sutures will eventually be, makes infants vulnerable

Question 27

functions of fontanels

Answer 27

allow compression of skull during delivery of child, allows rapid growth of brain

Question 28

fontanels (6)

Answer 28

anterior (largest), posterior, 2 sphenoid, 2 mastoid

Question 29

how many bones in the skull?

Answer 29

22

Question 30

3 ear ossicles

Answer 30

malleus, incus, stapes

Question 31

mnemonic devise for remembering bones of the orbit

Answer 31

My Eyes Feel Like Pulling Some Zzs

Question 32

bones of the orbit

Answer 32

maxilla, ethmoid, frontal, lacrimal, palatine, sphenoid, zygomatic

Question 33

mnemonic devise for remembering bones of the nasal cavity

Answer 33

Max’s Nose Is Very Easily Picked

Question 34

bones of the nasal cavity

Answer 34

maxilla, nasal, inferior nasal conchae, vomer, ethmoid, palatine