Axial Skeloton Flashcards

Understand Skeleton Axial (57 cards)

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
suture
an immobile joint
26
How many sutures that mark the articulations of the parietal bones?
4
27
What are the four sutures for parietal bones?
Coronal, Sagittal, Lamboid, and squamosal sutures
28
coronal suture
articulation between parietal bones and frontal bone anteriorly
29
sagittal suture
where right and left parietal bones meet superiorly
30
lambdoid suture
where parietal bones meet the occipital bone posteriorly
31
squamosal suture
where parietal and temporal bones meet
32
How many parietal bones in skull?
2
33
How many occipital bones?
1
34
occipital bones forms?
most of skulls posterior wall and base
35
Occipital bones major markings?
posterior cranial fossa, foramen magnum, and occipital condyles
36
condyles
round smooth surface
37
Temporal Bones form
the inferolateral aspects of the skull and parts of the cranial floor
38
temporal floor is divided into four regions:
squamous, tympanic, mastoid, and petrous
39
Major markings of temporal bones
zygomatic, styloid, and mastoid processes, and the mandibular and middle cranial fossae
40
temporal bones major openings
stylomastoid and jugular foramina, the external and internal auditory meatuses, and the carotid canal
41
sphenoid bone
butterfly-shaped bone that spans the width of the middle cranial fossa
42
sphenoid bone forms?
the central wedge that articulates with all other cranial bones
43
sphenoid bones has?
central body greater wings lesser wings
44
Ethmoid Bone
Most deep of the skull bones; lies between the sphenoid and nasal bones
45
Ethmoid bone forms
most of the bony area between the nasal cavity and the orbits
46
Facial Bones
14 bones of which only the mandible and vomer are unpaired
47
Facial bones paired bones are?
maxillae, zygomatics, nasals, lacrimals, palatines, and inferior conchae
48
Mandible
Lower jawbone | largest, strongest bone on the face
49
Mandible major markings
coronoid process mandibular condyle alveolar margin mandibular and mental foramina
50
Maxillary bones
medially fused bones that make up the upper jaw and the central portion of the facial skeleton
51
Maxillary bones facial keystone bones that articulate with?
all other facial bones except the mandible
52
Zygomatic Bones
irregularly shaped bones (cheekbones) that form the prominences of the cheeks and the inferolateral margins of the orbits
53
Nasal Bones (facial)
thin medially fused bones that form the bridge of the nose
54
(facial)lacrimal bones
contribute to the medial walls of the orbit and contain a deep groove called the lacrimal fossa
55
(facial)Palatine bones
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
Vomer (facial)
plow-shaped bone that forms part of the nasal spetum
57
Inferior Nasal Conchae | facial
paired | curved bones in the nasal cavity that form part of the lateral walls of the nasal cavity