Bones
description
Transcript of Bones
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Bones
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Skeleton consists of 206 bones.
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Subdivisions
• Axial• Appendicular
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Axial Skeleton
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Bones are organs composed of the following tissues:
• Bone tissue• Cartilage• Epithelial• Fibrous connective tissue• Blood connective • Nervous tissue
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Shapes of Bones
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Long –vs- Irregular BoneIrregular Bone
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Types of Bone Growth
• Intramembranous• Skull
– Comes from primitive connective tissue cells
• Endochondral• All other
– Comes from cartilage
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Endochondral Bone Growth
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Endochondral
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Spongy –vs-Compact
• Spongy found in the expanded end region of long bones and fills irregular space.
• Compact on outer bone and shafts of long bones.
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Intramembranous Bone Growth
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Bone Fractures
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Broken Bone
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Fractures heal more quickly:
-in young individuals
-in upper limbs as opposed to lower limbs
-in spongy bones –vs- compact bone
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How recent?
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Skull
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Cervical Vertebrae
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Labwork