1 History presents an historian with the task of producing a dialogue between the past and the present. 2  But as these temporal co-ordinates cannot be fixed, history becomes a continuous interaction between the historian and the past.
A routine blood test usually only test for some general features, like potassium, sodium, creatinine, urea, C-reactive protein and a few other. It does often make a blood count of both red blood cells and white blood cells too. In that way it can detect leukemia.
During routine visits to your health care provider, you are often asked to give a urine sample for testing. Many tests are done routinely, like checking for sugar (diabetes), bacteria (infection) and blood. Blood in the urine that you do not see is called microscopic hematuria.. This blood is only visible under a microscope. There are many causes and most are not serious, but may call for care by your health care provider.