The skull

Question 1

How many bones does the skull contain?

Answer 1

The skull has 22 bones, excluding the ossicles of ear , except for th

Question 2

How is the mandible joined to the skull?

Answer 2

The mandible is joined to the skull by a moveable joint

Question 3

Describe most of the skull bones and what are the skull bones joined by?

Answer 3

Most skull
bones are flat bones joined by
interlocking joints called sutures

Question 4

What is the skull divided into?

Answer 4

The skull is divided into the braincase (neurocranium) and the facial skeleton (viscerocranium).

Question 5

What is the main task of the skull?

Answer 5

The main task of the skull is the protection of the most important organ in the human body: the brain.

Question 6

Name the 8 cranial bones of the skull.

Answer 6

• Occipital
• 2 Temporal bones
• 2 Parietal bones
• Sphenoid
• Ethmoid
• Frontal

Question 7

Name the 14 facial bones.

Answer 7

• 2 Nasal
• 2 Maxillae
• 2 Zygomatic
• Mandible
• 2 Lacrimal
• 2 Palatine
• 2 Inferior nasal conchae
• Vomer

Question 8

List the functions of the skull.

Answer 8

The skull : 
• Forms the framework of the face
• Contains cavities for special sense organs
• Provides openings for air & 
food passage
• Secures the teeth
• Anchors muscles eg. 
muscles of facial 
expression & mastication

Question 9

What is the cranium divided into?

Answer 9

The cranium is divided into :
An upper domed part (calvaria) that covers the cranial cavity containing the brain
• A Base that consists of floor of cranial cavity
• The Lower anterior part- facial skeleton (viscerocranium)

Question 10

Name the bones that make up the calvaria.

Answer 10

CALVARIA
Temporal & parietal bones
Frontal, sphenoid, & occipital bones

Question 11

Name the bones that make up the cranium.

Answer 11

CRANIUM

Sphenoid, temporal, & occipital bones

Question 12

Name the bones that make up the facial skeleton.

Answer 12

FACIAL SKELETON 
Nasal bones
Palatine bones
Lacrimal bones
Zygomatic bones
Maxillae
Inferior nasal conchae
Vomer

Question 13

Describe the roof of the calvaria.

Answer 13

The calvaria roof is a dome-shaped roof

Question 14

What is the function of the roof of the calvaria?

Answer 14

The calvaria roof protects the superior aspect of brain

Question 15

What does the roof of the calvaria consist of?

Answer 15

The calvaria roof Consists mainly of the frontal, paired parietal, & occipital bones

Question 16

Calvaria - What is the frontal crest?

Answer 16

The frontal crest is the point of attachment for the falx cerebri

Question 17

What is the purpose of the depressions and pits(granular foveolae)?

Answer 17

The depressions and pits mark the location of the arachnoid granulations

Question 18

What creates the smaller grooves?

Answer 18

The smaller grooves are created by various meningeal vessels

Question 19

Where are the 4 largest sutures of skull located?

Answer 19

The four largest sutures of the skull are located where the parietal bones articulate with other bones:
coronal, sagittal, lambdoid sutures

Question 20

Which bones make up the calvaria/skull cap?

Answer 20

Frontal bone, parietal bones, & occipital bone

Question 21

What does the unpaired frontal articulate with?

Answer 21

The unpaired frontal bone
articulates with paired parietal bones at coronal
suture

Question 22

What do the 2 parietal bones articulate with?

Answer 22

The two parietal bones
articulate with each other
in midline at sagittal suture

Question 23

Which unpaired bone do parietal bones articulate with?

Answer 23

The Parietal bones articulate
with the unpaired occipital
bone at the lambdoid suture

Question 24

What is the junction of the sagittal and coronal sutures called?

Answer 24

Junction of sagittal & coronal sutures is bregma

Question 25

What is the junction of the sagittal and lambdoid sutures called?

Answer 25

Junction of sagittal & lambdoid sutures is lambda

Question 26

What does the frontal bone form?

Answer 26

The frontal bone forms the forehead, roof of orbit, most of anterior part of cranial floor

Question 27

What happens to the right and left frontal bones after birth?

Answer 27

After birth the right & left frontal bones unite at the | metopic suture

Question 28

What takes place superior to the orbit?

Answer 28

Superior to orbit, bone thickens – forms supra-orbital margin- contains foramen

Question 29

Incomplete foramen =

Answer 29

supraorbital notch

Question 30

Where do the frontal sinuses lie?

Answer 30

Frontal sinuses lie deep | to frontal squama

Question 31

Which bones form the sides and the roof of the cranial cavity?

Answer 31

Two parietal bones form sides & roof of cranial cavity

Question 32

CRANIAL BONES … PARIETAL BONE. What does the internal surface contain?

Answer 32

The internal surface contains many protrusions & depressions that accommodate blood vessels supplying dura mater

Question 33

What do the temporal bones form?

Answer 33

The temporal bones form the inferior lateral aspect of cranium + part of cranial floor

Question 34

What forms the zygomatic arch?

Answer 34

The zygomatic process of temporal and the temporal process of zygomatic bone