Axial Skeleton.

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Presentation transcript:

Axial Skeleton

22 bones Skull 8 cranium 14 face Encloses cranial cavity Fluid-filled Cushions 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 Sutures Frontal Parietal Temporal Occipital

Facial Bones Nasal bones Zygomatic bone Maxilla Mandible

Hyoid Does not directly articulate with any other bone. Aids in tongue movement and swallowing

Vertebral Column Thoracic Cage

Spinal Curvature 4 spinal curves Primary Secondary Thoracic Sacral Cervical Lumbar

Vertebral Types Cervical (7) Thoracic (12) Lumbar (5) Sacrum (5 fused) C1 (Atlas) C2 (Axis) Thoracic (12) Lumbar (5) Sacrum (5 fused) Coccyx (3-5 fused)

Thoracic Cage True ribs (Top 7) False ribs (Middle 3) Floating ribs (Bottom 2) Sternum