Skeletal System
Axial Skeleton Anatomy
The skull
8 cranial bones: occipital, parietal, frontal, temporal, sphenoid, ethmoid
14 facial bones
Sphenoid bone: keystone bone because it touches all other cranial
bones
Sella turcica – holds the pituitary gland
Ethomoid
Cristal galli and cribriform plates hold the olfactory bulb (nerves)
Figure 6.12c
Sinuses: Special openings that lighten the
skull, warm and moisten air
Hyoid bone – only bone that doesn’t
articulate with another bone
Anchors the tongue.
7
12
5
Bone Markings of Vertebra
Atlas and Axis (C1 and C2)
Sacrum and Coccyx – fused vertebra
Ribs (12 pair)
True (7) connect directly to
sternum via coastal cartilage
False (3) connect indirectly
Floating (2) don’t connect
Axial Practice Quiz
Anterior View
1
Any number with an *,
name the Bone marking.
For all numbers, name
3
the bone.
2*
4
8
5*
6
7*
Lateral view of skull
12*
13
11
10
9
8
1*
7*
6
2*
3*
4*
5*
Medial view of skull
6
1*
2
3
4
5*
Superior View of Skull after transverse cut.
1*
6*
2*
5*
3
4*
8
Inferior view of skull
7
6*
1
2*
5*
3*
4
1*
2*
3
4*
7*
5
6
Name the bones of the vertebral column and give the number of
vertebra for each category.
1
2
4
5*
3
10
9*
8*
2*
1
3*
7*
4*
5*
7
1*
4*
6*
8*
9*
2*
10*
3