the skeletal system. the skeletal system consists of: 1. bones 2. cartilage 3.connective tissue...
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The Skeletal System
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The skeletal system consists of:
1. Bones
2. Cartilage
3. Connective tissue
***There are about 206 bones in an adult
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Bone Functions
1. Protection• Heart/ lungs: ribs• Spinal cord: vertebrae• Brain: skull
2. Storage• Bones store minerals that help muscles and
nerves work• Long bones store fat for energy
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Bone Functions continued
3. Movement• Skeletal muscles pull on bones to help you move
4. Blood cell formation
• Some bones are filled with marrow, which makes blood cells.
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Internal Structure of Bone
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Parts of Bone
• Compact bone: No visible spaces, contains blood vessels
• Spongy bone: Has open spaces, but provides strength and support
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Parts of bone continued
• Red Marrow: Makes red and white blood cells
• Yellow Marrow: Stores fat in long bones
• Cartilage: Flexible connective tissue that is sometimes replaced by bone
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Osteoblasts
• Cells that make bone by depositing connective tissue and minerals