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Lecture 6.4: Skeletal System - PowerPoint PPT Presentation


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Lecture 6.4: Skeletal System. The Skull. AKA: The Cranium Protects our brain Gives us our senses. Frontal Bone. Forehead Orbits—spaces for eyes Frontal sinuses—air-filled chambers Lighten bone Produce mucus for nasal cavity. Figure 6.10. Parietal Bone (Paired).

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the skull
The Skull
  • AKA: The Cranium
  • Protects our brain
  • Gives us our senses
frontal bone
Frontal Bone
  • Forehead
  • Orbits—spaces for eyes
  • Frontal sinuses—air-filled chambers
  • Lighten bone
  • Produce mucus for nasal cavity
parietal bone paired
Parietal Bone (Paired)
  • Posterior to frontal bone
  • Sagittal suture—locks 2 bones together
  • Coronal suture--locks parietal to frontal
occipital bone
Occipital Bone
  • Most posterior
  • Lambdoid Suture—locks occipital with parietal
  • Foramen magnum—where spinal cord passes
temporal bone paired
Temporal Bone (Paired)
  • Below parietal
  • Squamous suture—connects parietal to temporal
sphenoid bone
Sphenoid Bone
  • Part of floor of cranium
  • Unites cranium and facial bones
  • Sellaturcica—depression that houses pituitary gland
ethmoid bone
Ethmoid Bone
  • Anterior to sphenoid
  • Medial eyes and roof and sides of nasal cavity
  • Nasal septum—divides nose into left/right sides