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Support
• form internal framework that supports and anchors all soft organs
• legs support trunk
• rib cage supports thoracic wall
http://www.ub.uit.no/baser/arkinord/data/media/378/kalvebakkbru01-med.jpg3
Protection
• Skull protects brain
• Vertebrae protects spinal cord
• Rib cage protects vital organs of thorax
http://www.biology-blog.com/images/blogs/10-2007/organic-armor-for-dogs.jpg4
Movement
• Skeletal muscles use the bones as levers to move the body and its parts.
http://www.inloughborough.com/cat/images/Martial%20Arts%20Clubs.jpg5
Blood Cell Formation• Hematopoiesis occurs within the marrow
cavities of certain bones.
http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/8636.jpg
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Types of Osseous Tissue
• Compact Bone– dense– Looks smooth– Homogeneous
• Spongy Bone– Composed of small needlelike pieces and lots
of open spaces
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Long Bones
• Typically longer than they are wide
• Have a shaft and heads at both ends
• Bones of limbs (except wrist and ankles)
• Mostly compact bones
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Flat Bones
• Thin, flattened, usually curved
• Two thin layers of compact sandwiching a layer of spongy
• Bones of skull, ribs, and sternum
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