Howes x's List: Multimedia

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  In a bone  marrow aspiration and biopsy, a doctor or nurse uses a thin needle to remove a  small amount of liquid bone marrow, usually from a spot in the back of your  hipbone called the posterior iliac crest. A bone marrow biopsy is often taken at  the same time. This second procedure removes a small piece of bone tissue and  the enclosed marrow

• blood cells develop from cells in the bone marrow called stem cells.
• Bone marrow is the soft material in the center of most bones.

• Stem cells mature into different kinds of blood cells. Each kind has a  special job:

   

  
  White blood cells help fight infection. There are several types of  white blood cells.

   

  
  Red blood cells carry oxygen to tissues throughout the body.

   

  
  Platelets help form blood clots that control  bleeding.
• Leukemia is cancer that  starts in the tissue that forms blood.

• The white blood cells that form from myeloid blasts are different from the  white blood cells that form from lymphoid blasts.

   

  
• n a person with leukemia, the bone marrow makes abnormal white blood cells. The  abnormal cells are leukemia cells.
• leukemia cells don't die when they should. They may crowd out normal white blood  cells, red blood cells, and platelets. This makes it hard for normal blood cells  to do their work.

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