In this way, the holes can move through the rock. Indeed, they do this so easily, Dr Freund has calculated, that many of them move out of the section of rock under stress altogether, leaving it with a surplus of electrons. Thus, a granite battery is charged.
Phlebotomy is the act of drawing blood from a patient through the use of medical needles. The blood extracted through the needle is then studied by a physician in order to determine the patient's health condition. The blood may also be used in other patients in the form of a blood transfusion.
How It Is Done. The health professional drawing your blood will: 1  Wrap an elastic band around your upper arm to stop the flow of blood. 2  This makes the veins below the band larger so it is easier to put a needle into the vein. 3  Clean the needle site with alcohol. 4  Put the needle into the vein.