The axial skeleton. Flashcards

1
Q

Bones are classified by _____.

A

shape

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2
Q

You can get l_____ bones, s____ bones, f____ bones, I_____ bones, s_____ bones and s_____ bones.

A

long, short, flat, irregular, sesamoid, sutural

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3
Q

The axial skeleton is _____. What does it not include?

A

longitudinal.

arms and legs

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4
Q

The _____ skeleton focuses on arms and legs etc.

A

appendicular

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5
Q

How many bones are in the entire skeleton?

A

206

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6
Q

What does the axial skeleton consist of?

A

Skull and associated bones, vertebral column, ribs and sternum.

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7
Q

A total of ____ bones in the _____ axis make up the axial skeleton.

A

80, longitudinal

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8
Q

The skull and associated bones are made up of 4 mane bones, name these categories.

A

Cranial, facial, auditory ossicles, hyoid bone.

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9
Q
we have;
8 \_\_\_\_ bones
14 \_\_\_\_\_\_ bones
6 \_\_\_\_\_\_\_ ossicles- 2 of each malleus, incus, stapes.
1 \_\_\_\_\_\_ bone.
A

cranial
facial
auditory
hyoid

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10
Q

What are all bones connected by?

What is the one exception?

A

sutures

Except from the mandible

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11
Q

In the skull, what is the suture that runs vertically down the back half of the skull called?

A

The sagittal suture

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12
Q

The ____ suture runs horizontally across the middle of the skull.

A

coronal

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13
Q

What is the cranial bone that forms the forehead and roof of nasal/orbital cavities known as?

A

The frontal bone

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14
Q

The _____ bone is above the lip.

A

maxillary

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15
Q

what suture runs horizontally at the back of the skull?

A

the lamboid suture

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16
Q

_____ bones form the walls and summit of the skull (jew cap area).

A

Parietal

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17
Q

Where is the occipital bone found?

A

Right at the back of the skull aka. lower posterior bone of the skull

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18
Q

at the side of the skull beside the ear, the _____ bone forms the walls and base of the cranium.

A

temporal

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19
Q

At the back, inner bit of the skull, you can find the _____ process.

A

mastoid

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20
Q

What is the bone going down the front of the nose called?

A

Nasal Bone

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21
Q

The ____ bone is beside (more at the front) the temporal bone.

A

sphenoid

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22
Q

The sphenoid bone is found at the ___ of the skull and forms part of the floor of the ______.

A

base, anterior

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23
Q

What is the mandible?

A

The jaw bone

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24
Q

Name some functions of the mandible.

A

chewing and speaking

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25
Where is the zygomatic bone found?
Beside the under eye
26
The ramus, mental foramen, mandibular notch and body are all parts of the ______.
mandible
27
The mandible has ____ main parts.
4
28
What is another name for the backbone?
the vertebral column
29
What is the function of the vertebral column?
It surrounds and protects the spinal cord which travels within the spinal canal.
30
C1-C7, is known as the ______ spine.
cervical
31
What does the dens of axis allow?
rotation of the head
32
What is the first cervical vertebra called?
the atlas
33
Describe the structure of C1/the atlas.
Thin, ring shaped bone with no body
34
What bones does C1 articulate with?
The occipital bone on the base of the skull and the axis.
35
What is C2 called?
The axis.
36
The axis contains the ____which projects superiorly.
dens
37
What is the main function of the axis/C2?
To support the weight of the head and allow pivotal movement.
38
How many cervical vertebrae are there?
7
39
The neck muscles attach to the _____ transverse ______ (across).
cervical transverse processes
40
The ___ muscles attach to the spinous processes (down).
back
41
Name the arches C1 has.
Anterior arch and posterior arch.
42
What is after the cervical spine?
The Thoracic Spine
43
The thoracic spine is T__ - T____
T1-T12
44
The _____ spine is made up of 12 vertebrae.
thoracic
45
The upper 4 thoracic vertebrae (T1 - T4) have some _____ features.
cervical
46
The lowest 4 thoracic vertebrae (T8 - T12) have some _____ features.
lumbar
47
T5-T7 are the most typically ______.
thoracic
48
What is the key difference between the cervical vertebrae and the thoracic vertebrae?
The thoracic vertebrae have a costal facet
49
What do the first ten thoracic vertebrae contain?
Facets for articulation with ribs
50
What is the proper name for the rib cage?
The thoracic cage.
51
What is the thoracic cage formed by?
The vertebral column, ribs and sternum
52
What is the sternum?
It is the breast bone- a long flat bone located in the centre of chest.
53
What does the thoracic cage enclose?
The heart and lungs
54
There is additional attachment via ______ from the thoracic cage to the ____.
cartiledge, sternum
55
What are T11 and T12 referred to as?
Floating ribs
56
Why are the last two thoracic vertebrae called floating ribs?
As they aren't connected to the anterior :)
57
How many Lumbar vertebrae are there?
5
58
L5 is the _____ lumbar vertebra.
largest
59
Lumbar vertebrae have ____, ______ shaped bodies.
large, kidney
60
What shape are lumbar vertebrae transverse processes?
They are long and thin
61
Do lumbar vertebrae have facets?
yes
62
What do lumbar facets allow?
they allow for extension and flexion
63
The spinous processes are ____, ____ and _____.
large short and square
64
S1 and S5 are _____ together to form one _____. What is it called?
fused, bone | The Sacrum
65
What is the sacrum the key site of?
The key site of muscle attachment to lower limbs
66
What shape is the sacrum?
a triangle
67
The Sacrum _____ the _____of the body and forms the ____ wall of the _____.
transmits, weight, posterior, pelvis
68
What lumbar vertebra number does the sacrum articulate with superiorly?
L5
69
Name the 2 other bones the Sacrum articulates with.
The coccyx (inferiorly) an the iliac bones (laterally)
70
What is the other name for the tailbone?
The Coccyx
71
The coccyx is the _____ segment of the human _____ column.
final, vertical
72
What fused together to form the coccyx?
Co 1 - Co4
73
what 3 things does the coccyx not contain?
lamina, spine or pendicles
74
What does the base of the coccyx articulate superiorly with?
The apex of the Sacrum