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Bones & Muscles

Bones & Muscles. How many bones does the human skeleton contain?. 206. Functions of the skeletal system. Gives shape & support Protects internal organs Moves muscles Forms blood cells Stores 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 • Gives shape & support • Protects internal organs • Moves muscles • Forms blood cells • Stores 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. http://www.bmb.psu.edu/courses/bisci004a/bone/fig81.jpg

  7. http://www.bmb.psu.edu/courses/bisci004a/bone/bone.htm

  8. Skeletal System is divided into two parts

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

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

  11. Types of Joints • Immovable • Skull • Pelvis • Movable • Pivot • Ball & socket • Hinge • Gliding

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

  13. 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

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

  15. 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

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

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

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

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

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

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

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

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

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

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

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

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

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

  29. How do muscles work

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

  31. Muscle Fiber Muscle Myofibril Inside a Muscle

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

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