Lecture 6 4 skeletal system
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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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Lecture 6.4: Skeletal System

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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)

  • Posterior to frontal bone

  • Sagittal suture—locks 2 bones together

  • Coronal suture--locks parietal to frontal


Figure 6.15b


Occipital Bone

  • Most posterior

  • Lambdoid Suture—locks occipital with parietal

  • Foramen magnum—where spinal cord passes


Figure 6.10


Temporal Bone (Paired)

  • Below parietal

  • Squamous suture—connects parietal to temporal


Figure 6.10


Sphenoid Bone

  • Part of floor of cranium

  • Unites cranium and facial bones

  • Sellaturcica—depression that houses pituitary gland


Figure 6.12a


Ethmoid Bone

  • Anterior to sphenoid

  • Medial eyes and roof and sides of nasal cavity

  • Nasal septum—divides nose into left/right sides


Figure 6.12a


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