Axial Skeleton

Skull

22 bones– 8 cranium

Encloses cranial cavityFluid-filledCushions and supports brain

– 14 face

Skulls of Infants and Children

Contains more bones Separated by fontanels

– Allow growth and distortion

Skull growth complete at 7 yrs.

Cranium Bones

Frontal

Occipital

Parietal

Sutures

Temporal

Mandible

Maxilla

Zygomatic bone

Nasal bones

Facial Bones

Hyoid

Does not directly articulate with any other bone.

Aids in tongue movement and swallowing

Vertebral ColumnThoracic Cage

Spinal Curvature

4 spinal curves– Primary

Thoracic Sacral

– Secondary Cervical Lumbar

Vertebral Types

Cervical (7)

– C1 (Atlas)

– C2 (Axis)

Thoracic (12)

Lumbar (5)

Sacrum (5 fused)

Coccyx (3-5 fused)

True ribs (Top 7)

False ribs (Middle 3)

Floating ribs (Bottom 2)

Sternum

Thoracic Cage