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Skeletal system. Functions . Shape and Support Protect organs Muscles are attached to bones for movement Produce blood cells in the marrow Storage for calcium and phosphorus which give bones their strength. Bone Structure. Periosteum - tough membrane covering the outer portion of bone

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Presentation Transcript
functions
Functions
  • Shape and Support
  • Protect organs
  • Muscles are attached to bones for movement
  • Produce blood cells in the marrow
  • Storage for calcium and phosphorus which give bones their strength
bone structure
Bone Structure
  • Periosteum- tough membrane covering the outer portion of bone
  • Compact bone- directly under the periosteum
      • Strong-purpose to give bone its strength
      • Contains calcium and phosphate
      • Blood vessels and bone cells found here
bone structure1
Bone structure
  • Spongy Bone- found at the ends of long bones
      • Small open spaces
      • Make the bone lightweight
      • Cavities contain marrow
      • Marrow can be yellow and composed of fat cells
      • Some marrow is red and produces red blood cells
cartilage
Cartilage
  • Ends of bones are covered with Cartilage
  • Slippery
  • Thick
  • Flexible
  • Important in joints
  • Shock absorber
  • Does not contain blood vessels
bone cells
Bone cells
  • Osteoblast
  • Deposit calcium and phosphorus into bone to make them hard
  • Build up bone
  • Osteoclast
  • Break bone down
  • Calcium and phosphorus are released
joints
Joints
  • Place where two bones come together
  • Held together by a band of tissue called a LIGAMENT
types of joints
Types of Joints
  • Immovable
  • Allow for little or no movement
  • Found in skull and pelvis
  • Movable
  • Control body movement
  • 4 major types
    • Pivot
    • Ball and Socket
    • Hinge
    • Gliding
pivot joint
Pivot Joint
  • One bone rotates in the ring of another bone that does not move
  • Example- Turning your head
ball and socket
Ball and Socket
  • Bone with a rounded end that fits into a cuplike cavity on another bone
  • Wider range of motion
  • Example- arms and legs
hinge joint
Hinge Joint
  • Back and forth movement like the hinges on a door
  • Elbows, knees, and fingers
gliding joint
Gliding joint
  • One part of the bone slides over another bone
  • Wrist and ankles and between vertebrae.
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