الفهرس 
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Abstract
The aim of this essay was an approach towards the ery- throcyte sedimentation rate and to give an account on it’s
nature, different methods of it’s determination and factors
that affect it. One of our aims was to discuss the correla-
tion of erythrocyte sedimentation rate with different physio-
logical and pathological conditions, with special care of
it’s variations in the pediatric age group of population. We tried also to evaluate the usefulness of erythrocyte
sedimentation rate measurement.
It was found that:
* The erythrocyte sedimentation rate is expressed as the
distance in millimeters per unit time (usually one hour)
that red cells fall from the top of the blood column to
the top of the layer of red cells.
* The process of sedimentation consists of three phases,
namely (1) a preliminary period during which aggregation
of the red corpuscles takes place, (2) a period of rapid
fall, and (3) the phase of packing when the corpuscular
masses are accumulating at the bottom of the tube, slow
up the rate of sedimentation.