Axial Skeloton Flashcards

Understand Skeleton Axial

1
Q

skeleton

A

dried up body, composed of bones, cartilages, joints and ligaments

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2
Q

Skeleton accounts for what percentage of body mass?

A

20%

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3
Q

What is the skeleton’s main component?

A

bones

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4
Q

Function of ligaments

A

connects bones and reinforce joints

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5
Q

Joints

A

the junction between bones

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6
Q

Two parts of skeleton

A

Axial and appendicular

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7
Q

Axial

A

80 bones
skull
vertebral column
thoracic cage

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8
Q

Appendicular

A

bones of the limbs and their girdles

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9
Q

Three regions of the axial skeleton?

A

skull
vertebral column
thoracic cage
bony thorax

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10
Q

How many bones in axial ?

A

80 bones are in the axial skeleton

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11
Q

Skull

A

the body’s most complex bony structure

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12
Q

What is the skull formed by?

A

the cranium and facial bones

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13
Q

How many bones are in the cranium?

A

8

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14
Q

how many bones are in the facial bones?

A

14

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15
Q

Cranium

A

protects brain and is the site of attachment for head and neck muscles

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16
Q

Facial bones supply the frame work of what?

A

face, sense organs, and the teeth

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17
Q

Facial bones provide what?

A

openings for the passage of air and food

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18
Q

Facial bones anchor?

A

the facial muscles of expression (smiling)

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19
Q

What are the eight cranial bones comprised of?

A
2 parietal    
 Ethmoid
2 temporal  
Sphenoid
frontal
occipital
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20
Q

Cranial Bones are desrcibed as what?

A

thin and strong for their weight

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21
Q

foramen

A

opening in bones for nerves and blood vessels to pass through

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22
Q

frontal bone forms what?

A

the anterior portion of the cranium

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23
Q

frontal bone articulates ?

A

posteriorly with the parietal bones via the coronal suture

24
Q

processes mean?

A

point of muscle attachment

25
Q

suture

A

an immobile joint

26
Q

How many sutures that mark the articulations of the parietal bones?

A

4

27
Q

What are the four sutures for parietal bones?

A

Coronal, Sagittal, Lamboid, and squamosal sutures

28
Q

coronal suture

A

articulation between parietal bones and frontal bone anteriorly

29
Q

sagittal suture

A

where right and left parietal bones meet superiorly

30
Q

lambdoid suture

A

where parietal bones meet the occipital bone posteriorly

31
Q

squamosal suture

A

where parietal and temporal bones meet

32
Q

How many parietal bones in skull?

A

2

33
Q

How many occipital bones?

A

1

34
Q

occipital bones forms?

A

most of skulls posterior wall and base

35
Q

Occipital bones major markings?

A

posterior cranial fossa, foramen magnum, and occipital condyles

36
Q

condyles

A

round smooth surface

37
Q

Temporal Bones form

A

the inferolateral aspects of the skull and parts of the cranial floor

38
Q

temporal floor is divided into four regions:

A

squamous, tympanic, mastoid, and petrous

39
Q

Major markings of temporal bones

A

zygomatic, styloid, and mastoid processes, and the mandibular and middle cranial fossae

40
Q

temporal bones major openings

A

stylomastoid and jugular foramina, the external and internal auditory meatuses, and the carotid canal

41
Q

sphenoid bone

A

butterfly-shaped bone that spans the width of the middle cranial fossa

42
Q

sphenoid bone forms?

A

the central wedge that articulates with all other cranial bones

43
Q

sphenoid bones has?

A

central body
greater wings
lesser wings

44
Q

Ethmoid Bone

A

Most deep of the skull bones; lies between the sphenoid and nasal bones

45
Q

Ethmoid bone forms

A

most of the bony area between the nasal cavity and the orbits

46
Q

Facial Bones

A

14 bones of which only the mandible and vomer are unpaired

47
Q

Facial bones paired bones are?

A

maxillae, zygomatics, nasals, lacrimals, palatines, and inferior conchae

48
Q

Mandible

A

Lower jawbone

largest, strongest bone on the face

49
Q

Mandible major markings

A

coronoid process
mandibular condyle
alveolar margin
mandibular and mental foramina

50
Q

Maxillary bones

A

medially fused bones that make up the upper jaw and the central portion of the facial skeleton

51
Q

Maxillary bones facial keystone bones that articulate with?

A

all other facial bones except the mandible

52
Q

Zygomatic Bones

A

irregularly shaped bones (cheekbones) that form the prominences of the cheeks and the inferolateral margins of the orbits

53
Q

Nasal Bones (facial)

A

thin medially fused bones that form the bridge of the nose

54
Q

(facial)lacrimal bones

A

contribute to the medial walls of the orbit and contain a deep groove called the lacrimal fossa

55
Q

(facial)Palatine bones

A

two bone plates that form portions of the hard plate, the posterolateral walls of the nasal cavity, and a small part of the oribits

56
Q

Vomer (facial)

A

plow-shaped bone that forms part of the nasal spetum

57
Q

Inferior Nasal Conchae

facial

A

paired

curved bones in the nasal cavity that form part of the lateral walls of the nasal cavity