Chapter 7 The axial skeleton review

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Identify the Axel Skeleton Bones

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Face bones

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Cranium Bones

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Zygomatic Bone Functions

Contribute to rims and lateral walls of orbits•

Form parts of __________ arches

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Ehmoid Bone Functions

Forms

Anteromedial floor of the cranium

Roof of the nasal cavity

Part of the nasal septum and medial orbital wall

Contains network of sinuses

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Sphenoid Bone Functions

Forms part of the floor of the cranium

Unites cranial and facial bones

Strengthens sides of the skull

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Temporal Bone Functions

Form parts of lateral walls of cranium and zygomatic arches

Articulate with mandible

Surround and protect internal ear

Attach muscles of jaws and head

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Hyoid Bone Functions

Supports the larynx

Attaches muscles of larynx pharynx and tongue

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Axial Skeleton Functions

Supports and protects organs in body cavities

Provides points of attachment for muscles that

Adjust positions of head, neck, and trunk

Perform breathing movements

Stabilize parts of appendicular skeleton

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Occipital Bone Functions

Forms much of posterior and inferior surfaces of cranium

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Parietal Bones Functions

Form part of superior and lateral surfaces of cranium

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Frontal Bone Functions

Forms the anterior part of cranium roof eye sockets

Contains frontal sinuses

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Palatine Bones Functions

Form posterior portions of hard palate

contribute to the floors of the orbits

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Maxillae Bone Function

Support upper teeth

Form inferior orbital rims

Form lateral margins of external nares

Form upper jaw and most of hard palate

Contain Largest sinuses

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Nasal Bone Function

Support bridge of the nose

Connect to cartilages of distal parts of the nose that extend to external nares

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Vomer Bone Function

Forms inferior portion of the bony nasal septum

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Inferior Nasal Conchae Function

Slow inhaled air

Create air turbulence in the nasal cavity

Increase epithelial surface area to warm and humidify inhaled air

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Lacrimal Bones Function

Form parts of medial walls of orbits

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Mandible Function

Forms the lower jaw

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Vertabral Column

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Cervical Curve

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develops as the infant learns to balance the weight of its head on the vertebrae of the neck

7 vertebrae

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Thoracic Curve

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provides room for the thoracic organs.

12 vertebrae

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Lumbar Curve

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balances the weight of the trunk over the lower limbs.This curve develops with the ability to stand.

5 vertebrae

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Sacral Curve

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provides room for various abdominopelvic organs

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bony landmarks of vertebrae lateral view

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Inferior view Vertebrae

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Posterior view Vertebrae

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lateral/sectional view vertebrae

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How thoracic vertebrae articulate with the ribs?

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T1–T8 each articulate with two pairs of ribs

T9–T11 articulate with one pair of ribs

T1–T10 transverse costal facets for rib articulation

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lateral View Sacrum

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Anaterior view Sacrum

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Stermun Components poster view

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Thoracic cage

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sutures of the skull posterior

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sutures of the skull superior view

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sutures of skull lateral view

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how the skull is able to pivot from side to side?

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Has heavy spinous process to attach muscles of head and neck

Bodies of axis and atlas fuse during development to form the dens

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Lateral view fontanelles

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Superior view fontanelles

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