To the Point on Joints

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To the Point on Joints!

• The Story of Your Skeletal System

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Your Bones

• What would happen if you didnt have bones?
  Well, I guess youd be floppy like a beanbag.
  Could you walk? Could you stand up? No way.
  Without bones, youd be a puddle of skin and guts
  on the floor!

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Support

• Bones have two functions
• It provides structure to help you stand up-up-up!
• Other bones protect all the wonderful and soft
  insides of your body. Can you name some other
  things inside your body? Hmmm...

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Your System

• You know, your body is a system. Whats a system
  you say? Well, its kind of like a computer.
  You have a monitor, keyboard, mouse (eek!), and a
  central processing unit that ALL work together.
  But you still call it a computer. Well, you have
  a clavicle, radius, patella, a spine, rib cage
  and the list goes on and on. You can list 206
  bones in your body, but you still call all them
  the skeletal system!

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Systems
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Locomotion

• What is locomotion? Like an engine pulls a
  train, your bones (with the help of your muscles)
  pull your body along. Walking, running and
  skipping is movement and movement is LOCOMOTION!

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Types of Joints

• You have four types of joints
• Joints allow your body to move in many ways.
• Hinge joints
• Ball and socket joints
• Gliding joints
• Joints that Pivot
• I wonder which bones do what?

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Hinge Joints

• Some joints open and close like the hinge
  fastened to a door. Your knees and elbows are
  great examples of hinged joints.

http//www.shockfamily.net/skeleton/JOINTS.HTML
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Ball and Socket

• With this joint, you have the most movement of
  all. The hips and shoulders have bones in which
  the round end of a long bone fit into the hollow
  of another bone. Well, well

http//www.shockfamily.net/skeleton/JOINTS.HTML
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Gliding Joints

• Then you have gliding joints that slide back and
  forth. Some rocking chairs have gliding hinges.

http//www.shockfamily.net/skeleton/JOINTS.HTML
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Lets Glide!!

• The bones in the wrists and ankles slide against
  each other in a gliding motion. Try out this
  joint by holding either right above your wrist or
  ankle and moving it to the right and left, and up
  and down. The gliding joint gives your wrists and
  ankles lots of freedom so you can really move
  around.

http//www.dartmouth.edu/anatomy/wrist-hand/bones
/bones2.html
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Pivoting Joints

• Pivot joints let you twist or rotate from side to
  side. Move your head from left to right. Now
  you are pivoting your head. You can also twist
  and bend at the waist.

http//norcalneuro.com/en/Images/07_Med_Info/Cervi
cal20spine,20anterior.jpg
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How do you muscles help?

• With all the work that your skeletal system has
  to do support, protect, locomotion (movement),
  hinge, glide, and pivot, it needs help.

http//www.wfmynews2.com/
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Muscles

• Muscles move cows, snakes, worms, and humans.
  Muscles move you! Without muscles you couldnt
  open your mouth, speak, shake hands walk, or move
  your food through your digestive system. You
  have over 630 muscles that move you. Muscles
  cant push. They pull.

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