Ch 6, Skeletal System

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• Ch 6, Skeletal System

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Chapter Overview

• 6.1 Skeletal System Functions
• 6.2 Bone Classification
• 6.3 Long Bones
• 6.4 Osseous Tissue
• 6.5 Blood Vessels and Nerves
• 6.6 Bone Formation
• 6.7 Bone Growth
• 6.8 Bone Remodeling

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Figure 6.1
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Figure 6.2a
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Figure 6.2b
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Figure 6.3
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Figure 6.4a
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Figure 6.4 b-c
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Concept 6.5 Blood Vessels and Nerves
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Figure 6.2a
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Concept 6.6 Bone Formation
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Bone Formation

• Ossification or osteogenesis
• two major types
• intramembranous ossification
• endochondral ossification

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Intramembranous Ossification

• simpler of two methods
• flat bones of skull and mandible formed this way
• soft spots of fetal skull also formed this way
• Figure 6.6

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Figure 6.6
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Figure 6.7
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Concept 6.7 Bone Growth
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Figure 6.8
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Bone Growth

• Thickness
• deposition of osseous tissue on bone surface

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Figure 6.9
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Concept 6.7 Bone Remodeling
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Bone Remodeling

• at any given time 5 of total bone mass in body
  is remodeled
• renewal rates
• compact bone 4 per year
• spongy bone 20 per year
• takes place at different rates in different
  regions
• subjecting a bone to stress will make it stronger
• osteoclastic and osteoblastic activity must be
  balanced

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End Chapter 6