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The Thoma-Zeiss counting apparatus almost universally used in this country.

The apparatus fully described in the larger works. custom essay writing company For the red cells, the blood flowing from the needle puncture in the finger tip and dissertation writing service reviews not expressed sucked into the appropriate tube the mark and the ampulla filled the mark with Ilayem's fluid. After thorough shaking have a uniform mixture part blood.

Paraphrasing

After expelling a few drops, a drop help writing a comparison and contrast essay placed in the counting chamber over the ruled scale, and the cover adjusted.

The counting done under a medium power one sixth or lower cells touching help writing my college essay the upper and left boundaries any square being counted as belonging that square, obviate any doubt as which have been counted, those touching the opposite editing service sides being neglected. dissertation writing service For an accurate count a large number horizontal rows squares each should counted, but a reasonable approximation may obtained counting as a unit four squares in a row, taking the average number cells in a considerable number such counts, and multiplying. One small square equals depth area, making.

Summarizing paraphrasing

ITence four squares taken together equal or. The blood has been diluted times, hence the factor For the more exact count squares should utilized.

In this case take the size the small square as m.m.

its depth, equal Since the dilution the factor becomes. By multiplying the average number red blood cells in the small square this factor obtain the total number.

If squares contain, cells the number per square, equals, the number red cells per cubic If the count red and white cells made at the same time Toison's fluid advisable, since colors the leukocytes, and renders Lenkaoytes With the white pipette large drop blood drawn with gentle suction into the tube the mark, and diluted ten times the introduction the, acetic acid solution, used render the reds invisible.

Methyl-green, methyl-violet or other coloring agent makes the count easier rendering the nuclei the leukocytes more easily visible.

The drop placed upon the ruled disc, and all the leukocytes in all the small squares are counted. If greater exactness desired a greater number separate drops are counted. If find, for example, that there are white blood corpuscles in squares the percentage. and our factor, the product, area one square, depth square. Thus. gives, as the number leukocytes per cubic millimeter. Many supplementary methods have been devised and may in fact easily devised the expert, used in case different apparatus employed as the red pipette for the white count or in case the number reds and whites varies greatly from the normal, as in severe anemia or leukemia. We have what is the best site to buy essays space but for a single standard method in each case. The Hematocrit. The volume cells in the blood may determined the use this instrument The white cells are thrown the extremity the rapidly revolving tube, the red cells are superimposed and the plasma floats above.

 

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