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Skeletal system


									What is the skeletal system
 Your Skeletal system is all of the bones in the body and
  the tissues such as tendons, ligaments and cartilage
  that connect them.
 Your teeth are also considered a part of the skeletal
  system but there not labeled as bones.
 Your teeth are made of enamel and dentin.
  SOMETHING to know is Enamel is the strongest
  substance in your body!!
The support , movement, protection
 The main job of the skeleton is to provide support for our
  body. Without your skeleton your body would collapse into
  a heap. Your skeleton is strong but light. Without bones
  you'd be just a puddle of skin and guts on the floor.
 Bones provide the structure for muscles to attach so that
  our bodies are able to move. Tendons are tough inelastic
  bands that hold attach muscle to bone.
 Your skeleton also helps protect your internal organs and
  fragile body tissues. The brain, eyes, heart, lungs and spinal
  cord are all protected by your skeleton. Your cranium
  (skull) protects your brain and eyes, the ribs protect your
  heart and lungs and your vertebrae (spine, backbones)
  protect your spinal cord.
What is bone made of?
 A typical bone has an outer layer of hard or compact
 bone, which is very strong, dense and tough. Inside
 this is a layer of spongy bone, which is like
 honeycomb, lighter and slightly flexible. In the middle
 of some bones is jelly-like bone marrow, where new
 cells are constantly being produced for the blood.
 Calcium is an important mineral that bone cells need
 to stay strong so keep drinking that low-fat milk!
 Common Name         Scientific Name
   skull                  cranium
   Jawbone                mandible
   collarbone             clavicle
    shoulder blade        scapula
   breast bone            sternum
   funny bone             humerus
   spine                  vertebrae
   hips                   pelvis
   wrist                  carpals
   thigh bone             femur
   kneecap                patella
   shin bone              tibia
   ankle                  tarsals
Things to know
 When you were born you had over 300 bones. As you
  grew, some of these bones began to fuse together. The
  result? An adult has only 206 bones!
 With a lot of help. You need muscles to pull on bones
  so that you can move. Along with muscles and joints,
  bones are responsible for you being able to move. Your
  muscles are attached to bones. When muscles
  contract, the bones to which they are attached act as
  levers and cause various body parts to move.
 The human hand has 27 bones; your face has 14!
 The longest bone in your body, Your thigh bone, the
  femur -- it's about 1/4 of your height. The smallest is
  the stirrup bone in the ear which can measure 1/10 of
  an inch.
 humans and giraffes have the same number of bones
  in their necks? Giraffe neck vertebrae are just much,
  much longer!
 You have over 230 moveable and semi-moveable joints
  in your body
Words to know
 Tendons- are tough inelastic bands that hold attach muscle to bone.
 Bone marrow- The soft, spongy tissue found in the center of most
    large bones that produces the white cells, red cells, and platelets.
   Vertebra- Any of the bones or cartilaginous segments forming the
    spinal column.
   Cranium-The portion of the skull enclosing the brain; the braincase.
   A tough, elastic, fibrous connective tissue found in various parts of the
    body, such as the joints, outer ear, and larynx. A major constituent of
    the embryonic and young vertebrate skeleton, it is converted largely to
    bone with maturation.
   Ligament- Anatomy A sheet or band of tough, fibrous tissue
    connecting bones or cartilages at a joint or supporting an organ.

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