Axial Skeleton Anatomy 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)

Sinuses: Special openings that lighten the skull, warm and moisten air 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 Any number with an *, name the Bone marking. For all numbers, name the bone. 1 2* 3 4 8 5* 6 7*

Lateral view of skull 12* 13 11 10 9 8 1* 7* 6 2* 4* 3* 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.

4 5* 1 2 3

9* 10 8* 2* 1 3* 7* 4*

5* 7 1* 4* 6* 8* 9* 2* 10* 3