skeletal system axial skeleton anatomy. the skull 8 cranial bones: occipital, parietal, frontal,...
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Skeletal System
Axial Skeleton Anatomy
The skull8 cranial bones: occipital, parietal, frontal, temporal, sphenoid, ethmoid14 facial bones
Sphenoid bone: keystone bone because it touches all other cranial bonesSella turcica – holds the pituitary glandEthomoidCristal 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 boneAnchors 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 cartilageFalse (3) connect indirectlyFloating (2) don’t connect
Axial Practice QuizAnterior View
Any number with an *, name the Bone marking.For all numbers, namethe bone.
1
2*
3
4
5*
6
7*
8
Lateral view of skull
1*
2*3*
4*
5*
67*
8
9
10
11
12*
13
Medial view of skull
1*
2
3
4
5*
6
Superior View of Skull after transverse cut.
1*
2*
3
4*
5*
6*
Inferior view of skull
1
2*
3*
4
5*
6*
7
8
1*
2*
3
4*
5
6
7*
Name the bones of the vertebral column and give the number of vertebra for each category.
1
2 3
45*
1
2*
3*
4*
7*
8*
9*10
1*
2*
3
4*
5*
6*
7
8*
9*
10*