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.
Lab tests for blood in urine usually just involve dipping a test strip into a fresh urine sample. The condition of having blood present in your urine is called hematuria, but the amount of blood may be too low to be seen with the naked eye. The condition may be trivial but can also signal a problem. slide 1 of 4.