Blood

• What is blood made up of?

  -plasma

  -platelets

  -red blood cells

  -white blood cells
• what is plasmas job


  holds all components of blood flow

  -platelets, RBC, WBC,
• what are platelets jobs

  -to clot blood and form scabs over wound
• Platelets characteristics


  -no nucleus

  -formed in red bone marrow

  -help blood clot

  -protect new skin

  -stop bacteria entering