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The Skeletal System PowerPoint PPT Presentation


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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

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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

  • Bones associated with skull, thorax and vertebral column

  • 80 bones


2. Appendicular

  • Bones associated with extremities and shoulder and hip joints

  • 126 bones

  • 80 + 126 = 206


Bone Terminology (p. 128)


Axial Skeleton


Breakdown


Breakdown (Axial)

  • Skull – 22

  • Auditory ossicles – 6

  • Hyoid – 1

  • Thoracic cage – 25

  • Vertebral column – 26

  • Total = 80


The Skull

  • 22 bones

  • Cranial – 8

  • Those in direct contact with the brain

  • Facial – 14

  • Those not in contact w/ the brain


The Skull

cranial

facial


Sutures

Immovable

joints

between

skull bones


Sutures


A. Cranial bones1. Frontal (anterior)


1. Frontal (lateral)


1. Frontal (superior)


2. Parietal


3. Temporal


Temporal (disarticulated)


External auditory canal


Mastoid process


Styloid process


Zygomatic process


Squamous portion


Mandibular fossa


Petrous portion


4. Occipital (posterior)


4. Occipital (inferior)


4. Occipital (superior)


5. Sphenoid

  • Center bone of the skull

  • Most skull bones articulate with it.

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


5. Sphenoid (superior)


5. Sphenoid (lateral)


5. Sphenoid (inferior)


5. Sphenoid (superior)


Sphenoid (disarticulated and superior)


Sphenoid(disarticulated and posterior)

2 large wings

2 small wings

2 feet


Greater wing (posterior)


Greater wing (superior)


Greater wing (lateral)


Lesser wing (posterior)


Lesser wing (superior)


Sella turcica (superior)


Sella turcica (sagittal)


Pituitary gland


Pterygoid processes (posterior)


Pterygoid processes (inferior)


6. Ethmoid (superior)


Olfactory Nerve


6. Ethmoidcribriform plate


6. Ethmoid (sagittal)


6. Ethmoid (sagittal)


Ethmoid (frontal)


Flower


Facial bones1. Zygomatic (anterior)


1. Zygomatic (lateral)


2. Maxilla (anterior)


2. Maxilla (lateral)


2. Maxilla (inferior)


3. Palatine (inferior)


4. Nasal (anterior)


4. Nasal (anterior)


The Orbit


The Orbit


The Orbit

What bone(s) form:

  • The superficial rim (SIML)

  • The floor

  • The roof

  • The interior walls (PML)


Lacrimal (anterior)


6. Inferior conchae


7. Vomer (sagittal)


7. Vomer (inferior)


8. Mandible


8. Mandible

  • Only bone of skull to have moveable joint

  • Temporomandibular joint (TMJ)

  • Articulates in the mandibular fossa of the temporal bone


TMJ


8. Mandible

Mandibular foramen


8. Mandible


Hyoid

Associated with movements of tongue

Doesn’t articulate with any other bone


Fontanels (lateral)


Fontanels (superior)


Fontanels (anterio-superior)


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