1. Enumeration of W.B.Cs lab 4
By:
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2. The objective of the experiment:
Set the number of white blood cells in a sample of blood taken from human use Hemocytometer.

3. Tools used in the experiment
1 - Hemocytometer 2 - solution relieve the white blood cells and consists of: A - 3 ml acetic acid snowy (to break down red blood cells) B - 1 ml methyl violet Methyl violet (dye to white cells). C - 96 ml of distilled water 3 - covers slides 4 - Microscope

4. 1- Swab the hemocytometer and cover slipe with 70% EtOH and add cover on sild.
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5. and draw blood up to the 0.5 mark.
2- Swab towards the side of the tip of a little-used finger with 70% EtOH.
and draw blood up to the 0.5 mark.
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6. 3-Then completed a mitigation solution until the mark 11 and Mix a solution of blood dilution
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7. 4-Seal the tip with your finger and shake well to mix
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8. 5-get rid of a few drops of diluted blood through the bottom hole of the pipette then put a drop of blood diluted at the edge of the glass cover subject on the slide.
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9. 6- make small screening force to determine the distribution of white blood cells as it should be a homogeneous distribution and no pool, which was found it means that blood is not withdrawn in the right way did not ease as it should.
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11. 7-count the white blood cells use a Microscope (Focus with x10 objective lens). The count is in four large boxes located in the corners of the large box.
Note that all the big box contains 16 small square, which is the count in 64 small square
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13. 8- Also, The count of red blood cells use a big lens (X40).

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18. Types of white blood cells
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19. Method of calculation:
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20. Example White Blood Cell (WBC) Count Reference Ranges
4,500-10,000 white blood cells per mm3
Approximate Normal Range
 More than 11,000 white blood cells per mm3
Approximate High Range
 Less than 4,000 white blood cells per mm3
Approximate Low Range
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