A.1. Template for cover page
A.2. Template with key 

     a. To learn the difference in appearance of the
        different types of cells found in human blood,
        colour the cartoons of the blood cells as indicated
        by the key.

     b. You have a slide of normal blood.  The slide is
        safe to touch.  It has been treated with a chemical
        that would kill all microbes.  It has also been
        treated with dyes so that the blood cells are
        coloured and easy to see.
 
     Now examine the blood film under the microscope. First
use the objective with the lowest magnification to
find  the level containing the layer of blood. You will see
lots of very small, round objects which are the blood cells.
When you can see them, change to the objective with
higher magnification.  (There are probably one or two of
these.)  You now should be able to see not only the cells
but some details about them.  The first thing that you will
see is that there are different types of cells.  
 
     Look at your KEY TO BLOOD CELLS to see the name and
     the appearance of the different types of blood cells.

         i.  Most of the cells are red blood cells (RBCs).
        ii.  The rest of the cells are white blood cells
             (WBCs)are somewhat larger than RBCs and are
             different colours.
       iii.  The platelets are not entire cells but pieces
             of cells.  They appear smaller than either the
             RBCs or the WBCs and thus are more difficult
             to find.
  
     How many of the types of cells shown on the guide can 
     you identify?  
     Hint:  The most common ones will appear in every field.
       
     To see some of the less common types of cells, you
will have to look at quite a few different areas (fields)
of the blood. The more fields that you examine the more
accurate information you will have about the variety of
blood cells available.  To do this you will have to move
the slide from side to side and from front to back.  
       
     As you find each type of cell, make a tick mark by
that cell on the KEY.

Then answer the following questions:
 
 a.  The most common kind of cell is the __________.
   
 b.  The next most common type of cell is the __________.
   
     This is a very common blood test.  It shows: if you
have the right general assortment of blood cells

1. Healthy red cells capable of supplying you with
   sufficient oxygen.  If not anemia..... 

2. Healthy white blood cells (WBCs) or leucocytes.  The
   number and assortment of these increase cells increase
   under certain conditions.  For example, your body makes
   extra WBCs to fight microbial infections.  If your blood
   shows an increase in the percentage of the "polys" with
   the pink granules (neutrophils) this tells the physician
   that you probably have an infection with a bacterium.
   However, if your blood showed an increase in the
   percentage of lymphocytes, this would suggest an
   infection with a virus.