1. Bones & Muscles

3. How many bones does the human skeleton contain?

4. 206

5. Functions of the skeletal system Gives shape & support Protects internal organs Moves muscles Forms blood cells Stores calcium and phosphorous

6. 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 Bone Cross Section

7. http://www.bmb.psu.edu/courses/bisci004a/bone/fig81.jpg

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

9. Skeletal System is divided into two parts

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

11. Appendicular Skeleton Legs Pelvis Arms Shoulders

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

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

14. 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

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

16. 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

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

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

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

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

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

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

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

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

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

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

27. http://www.sc.edu/union/Sears/AnimalTissue/im.tissue Cardiac.jpg

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

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

30. How do muscles work

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

32. Muscle Fiber Muscle Myofibril Inside a Muscle

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