Types of Joints


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Types of Joints

  1. 1. Hola! My name is Flaco, and I want to give you a tour of the types of joints in the human body.by Amber Fuhrer
  2. 2. Let me tell you a little about myself.I live in a cemetery…
  3. 3. … and this year it is my jobto get everyone ready for theDia de los Muertos dance!
  4. 4. We celebrate everyyear around the sametime as Halloween.
  5. 5. Since everyone here is a skeleton,I have studied a lot about joints,so I can tell them how to moveto the music!
  6. 6. OK, let’s talk aboutmovement and thepurpose of your joints…
  7. 7. What if we didn’t have joints?If we tried to MOVE,we would fall on our faceslike a stack of dominoes!
  8. 8. So, first of all, we have fixed, semi-moveable, and moveable joints.What good are fixed joints?
  9. 9. Fixed JointsThe skull has fixed joints.As you grow, the bones cometogether and become stronger toprotect your brain.
  10. 10. The pelvis isalso fixed.
  11. 11. Semi-moveable Your spine has semi-moveable jointsJoints give your body support and shape, that but they still let you move a little.
  12. 12. Spongy tissue between vertebraekeeps the bones from scrapingagainst each other…Ouch!
  13. 13. …and lets yousway to the music!
  14. 14. moveable Joints are also known as synovial joints. The space between the bones is filled with synovial fluid, which protects and lubricates the joints.
  15. 15. For dancing, moveable jointsare the most importantbecause they let us move ourarms, legs, and hips.
  16. 16. There are five typesof moveable joints.
  17. 17. 1 Hinge
  18. 18. The knee joint works like thehinge on a door. It brings theupper and lower leg bones closertogether so we can bend!
  19. 19. Sometimes hinge joints arealso called angular jointsbecause they form angleslike the letter V.
  20. 20. This is what happenswhen your hinge jointsdon’t work anymore.You have to get areplacement.
  21. 21. 2
  22. 22. Shoulders(compressed)
  23. 23. Ball and sockets joints arethe most moveable. Youcan move your leg bonearound like this pestle orstick in the bowl.
  24. 24. 3
  25. 25. Basketball players can pivotaround on one foot toreposition their bodies.
  26. 26. The pivot joint in your neck lets youmove your head from left to rightand back the same way a car tirecan be steered left to right.
  27. 27. …Or like the way anoscillating fan movesback and forth!
  28. 28. Did you know you havetwo bones in the first partof your arm?You use small pivot jointsin your forearms to twistthe lid off a jar.
  29. 29. 4 Sadd le
  30. 30. The saddle joint letsme cross my thumbover my palm to helphold things…
  31. 31. … and to showthe number fourwith my hand!
  32. 32. OK. Now for the last type…
  33. 33. 5
  34. 34. Gliding joints allow the small bones inyour wrists and ankles to easily glidepast each other for flexible movement.
  35. 35. Click the hand x-rayfor a review of thetypes of moveable joints. Que bueno!
  36. 36. Happy Dia de los Muertos!Thanks for watching!
  37. 37. See you at the dance!
  38. 38. CreditsStock Exchange (users nickwijan, LesKZN, thesaint,strakplan, and 1234326)istockphoto.com(iStock_000010980262Medium_dancing_skeleton_from_hell; iStock_000017810937Small_dead_ballerina)http://www.doolins.com/jointeddayofthedeadskeletons.aspxMicrosoft Image GalleryAmber Fuhrer’s iphone (4 hand)http://www.jeffsims.net/flash/skeleton.html