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.
Gene testing can be used to confirm a diagnosis of hemochromatosis. There are two gene tests: the cheek test and the whole blood test. The cheek test uses a mascara-like wand to scrape cells from the inside of the mouth. For a whole blood test, a vial of blood is drawn from the arm.