Chapter 13 Support in organisms

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Chapter 13 Support in organisms
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Bone

• Living tissue
• Hardwith calcium and phosphate

• Compact boneouter layerrich in calcium
  phosphate and calcium carbonate
• Spongy boneat the 2 endsa network of fibres
• Marrow cavitywith red bone marrow - produce RBC
  and WBCwith yellow bone marrow - a fatty tissue

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Cartilage

• Living
• Softer than bones? with less calcium and
  phosphate
• act as cushion and shock-absorber between bones

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Skeleton
Axialskeleton
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Skeleton
Appendicular skeleton
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Joints and movement

• Joints is where 2 bones meet.
• Immovable joints(e.g., in skull)
• Moveable joints

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Flexor vs. Extensor
Triceps contract
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Flexor vs. Extensor
Biceps contract
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Flexor vs. Extensor
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Flexor vs. Extensor

• When flexor (??) contracts-gt the joints bends

• When extensor (??) contracts-gt the joints extends