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Bones & Muscles

Bones & Muscles. How many bones does the human skeleton contain?. 206. Functions of the skeletal system. Give shape & support Protect internal organs Moves muscles Form blood cells Store calcium and phosphorous. Bone Cross Section. Periosteum: soft, thin, covers and protects the bone.

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Bones & Muscles

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  1. Bones & Muscles

  2. How many bones does the human skeleton contain?

  3. 206

  4. Functions of the skeletal system • Give shape & support • Protect internal organs • Moves muscles • Form blood cells • Store calcium and phosphorous

  5. Bone Cross Section Periosteum: soft, thin, covers and protects the bone Compact Bone: Hard, outer surface. Can heal itself when broken Spongy Bone: Porous, contains blood vessels, nerves Marrow: manufactures red blood cells

  6. Skeletal System is divided into two parts

  7. Axial Skeleton • Skull (protects the brain). • Ribs ( protect lungs, and heart). • Spinal column (houses and protects the spinal cord).

  8. Appendicular Skeleton • Legs • Pelvis • Arms • Shoulders

  9. Types of Joints • Immovable • Skull • Pelvis • Moveable • Pivot • Ball & socket • Hinge • Gliding

  10. http://www.nhfyouthworld.org/junior/mayjun/skeleton.jpg

  11. Types of Joints • Ball and Socket Joint • Bone with a rounded end that fits into a cuplike cavity on another bone http://www.shockfamily.net/skeleton/JOINTS.HTML

  12. Ball & Socket: Shoulders and Hips • Allows arms and hips to move in any direction • Can move in a full 360 degrees

  13. Types of Joints • Pivot Joint • One bone rotates in a ring of another bone that does not move http://www.funhousefilms.com/b-pivot2.jpg

  14. Pivot Joints: First two neck vertebrae & joint beneath elbow • Moves in a semicircle motion by twisting against each other

  15. Types of Joints • Hinge Joint • Back-and-forth movement like hinges on a door http://www.shockfamily.net/skeleton/JOINTS.HTML

  16. Hinged: Elbows & Knees • Move like hinges on a door • Limited movement • Can only swing back and forth

  17. Type of Joints • Gliding Joint • One part of a bone slides over another bone http://www.shockfamily.net/skeleton/JOINTS.HTML

  18. Gliding Joints: Spine, Wrists, Ankles • Slide against each other in a gliding motion • Gives your wrists and ankles lots of freedom

  19. Immoveable joints are located in the skull and pelvis.

  20. http://www.lifesci.utexas.edu/faculty/sjasper/images/john21.19.jpghttp://www.lifesci.utexas.edu/faculty/sjasper/images/john21.19.jpg

  21. http://www.bio.psu.edu/

  22. http://www.bmb.psu.edu/courses/bisci004a/tissues/skeletal.jpghttp://www.bmb.psu.edu/courses/bisci004a/tissues/skeletal.jpg

  23. http://www.bio.psu.edu/

  24. http://www.sc.edu/union/Sears/AnimalTissue/im.tissueCardiac.jpghttp://www.sc.edu/union/Sears/AnimalTissue/im.tissueCardiac.jpg

  25. http://www.bio.psu.edu/

  26. http://www.bmb.psu.edu

  27. How do muscles work

  28. http://www.sirinet.net/~jgjohnso/muscle.html

  29. Muscle Fiber Muscle Myofibril Inside a Muscle

  30. http://www.cytochemistry.net/microanatomy/muscle/smooth1.jpg

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