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The Skeletal System. Overview And The Skull. The Skeletal System. Includes the following: Bones (206) Cartilages Ligaments. Functions. Support and protection Storage of calcium Blood cell production Movement. Two Divisions. Axial

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The skeletal system l.jpg

The Skeletal System

Overview

And

The Skull


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The Skeletal System

  • Includes the following:

  • Bones (206)

  • Cartilages

  • Ligaments


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Functions

  • Support and protection

  • Storage of calcium

  • Blood cell production

  • Movement


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Two Divisions

  • Axial

  • Bones associated with skull, thorax and vertebral column

  • 80 bones


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2. Appendicular

  • Bones associated with extremities and shoulder and hip joints

  • 126 bones

  • 80 + 126 = 206





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Breakdown (Axial)

  • Skull – 22

  • Auditory ossicles – 6

  • Hyoid – 1

  • Thoracic cage – 25

  • Vertebral column – 26

  • Total = 80


The skull l.jpg
The Skull

  • 22 bones

  • Cranial – 8

  • Those in direct contact with the brain

  • Facial – 14

  • Those not in contact w/ the brain


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The Skull

cranial

facial


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Sutures

Immovable

joints

between

skull bones



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A. Cranial bones1. Frontal (anterior)

















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5. Sphenoid

  • Center bone of the skull

  • Most skull bones articulate with it.

  • List the bones that do and those that don’t!






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Sphenoid (disarticulated and superior)


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Sphenoid(disarticulated and posterior)

2 large wings

2 small wings

2 feet














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6. Ethmoidcribriform plate






Facial bones 1 zygomatic anterior l.jpg
Facial bones1. Zygomatic (anterior)











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The Orbit

What bone(s) form:

  • The superficial rim (SIML)

  • The floor

  • The roof

  • The interior walls (PML)







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8. Mandible

  • Only bone of skull to have moveable joint

  • Temporomandibular joint (TMJ)

  • Articulates in the mandibular fossa of the temporal bone



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8. Mandible

Mandibular foramen



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Hyoid

Associated with movements of tongue

Doesn’t articulate with any other bone





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