Skeletal

• What is one function of the skeleton?

  Support keeps body upright
• How does the skeleton aid in movement?

  Part or whole movement of body
• What does the skull protect?

  Brain
• What do rib bones protect?

  Lungs
• What do bones attach to?

  Skeletal muscle
• What does bone marrow produce?

  Blood cells
• What minerals are stored in bones?

  Calcium, iron, potassium, phosphorous
• What happens to minerals stored in bones when needed?

  They are released into blood
• What is the axial skeleton composed of?

  Skull, vertebrae, ribs, sternum
• What does the appendicular skeleton include?

  Bones in arms and legs
• What are the four types of bones?

  • Long bone: arms and legs
  • Short bone: wrists and ankles
  • Flat bone: ribs, shoulder blades, skull
  • Irregular bone: backbone
• What characterizes a long bone?

  It has a long, thin shape
• What characterizes a short bone?

  It has a squat, cubed shape
• What characterizes a flat bone?

  It has a flattened, broad surface
• What are fibrous joints?

  Fixed or immoveable joints
• Where can fibrous joints be found?

  In the skull and teeth
• What are cartilaginous joints?

  Joints joined entirely by cartilage
• What type of movement do synovial joints allow?

  Freely moveable movement
• What is synovial fluid?

  A clear sticky substance in joints
• What does the synovial membrane do?

  Produces synovial fluid
• What is a bursa?

  A sac of synovial fluid
• What is the function of a bursa?

  Reduces friction during movement
• What is cartilage?

  Smooth, fibrous tissue covering bones
• What does cartilage prevent?

  Rubbing of articulating bones
• What is the role of cartilage in shock absorption?

  It is spongy to absorb shock
• What are the types of movements at joints?

  • Extension: increases distance and angle
  • Flexion: decreases distance and angle
  • Gliding: allows bones to glide past each other
• What does extension do at a joint?

  Increases distance between two bones
• What does flexion do at a joint?

  Decreases distance between two bones
• What is a gliding movement?

  Allows bones to glide past one another
• Where does gliding movement usually occur?

  Between bones on flat surfaces