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Skeletal system

Skeletal system. Functions . Shape and Support Protect organs Muscles are attached to bones for movement Produce blood cells in the marrow Storage for calcium and phosphorus which give bones their strength. Bone Structure. Periosteum - tough membrane covering the outer portion of bone

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Skeletal system

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  1. Skeletal system

  2. Functions • Shape and Support • Protect organs • Muscles are attached to bones for movement • Produce blood cells in the marrow • Storage for calcium and phosphorus which give bones their strength

  3. Bone Structure • Periosteum- tough membrane covering the outer portion of bone • Compact bone- directly under the periosteum • Strong-purpose to give bone its strength • Contains calcium and phosphate • Blood vessels and bone cells found here

  4. Bone structure • Spongy Bone- found at the ends of long bones • Small open spaces • Make the bone lightweight • Cavities contain marrow • Marrow can be yellow and composed of fat cells • Some marrow is red and produces red blood cells

  5. Cartilage • Ends of bones are covered with Cartilage • Slippery • Thick • Flexible • Important in joints • Shock absorber • Does not contain blood vessels

  6. Bone cells • Osteoblast • Deposit calcium and phosphorus into bone to make them hard • Build up bone • Osteoclast • Break bone down • Calcium and phosphorus are released

  7. Joints • Place where two bones come together • Held together by a band of tissue called a LIGAMENT

  8. Types of Joints • Immovable • Allow for little or no movement • Found in skull and pelvis • Movable • Control body movement • 4 major types • Pivot • Ball and Socket • Hinge • Gliding

  9. Pivot Joint • One bone rotates in the ring of another bone that does not move • Example- Turning your head

  10. Ball and Socket • Bone with a rounded end that fits into a cuplike cavity on another bone • Wider range of motion • Example- arms and legs

  11. Hinge Joint • Back and forth movement like the hinges on a door • Elbows, knees, and fingers

  12. Gliding joint • One part of the bone slides over another bone • Wrist and ankles and between vertebrae.

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