More detail and supporting information is in the body of this article. 1  Leg pain refers to any kind of pain that occurs between the heels and the pelvis. 2  Many causes of leg pain are obvious, such as injury after an accident.  Leg pain can have less obvious causes, such as peripheral artery disease.
Cardiopulmonary resuscitation (CPR) is an emergency procedure that is performed on people who are suffering from cardiac arrest. The purpose of CPR is to provide a flow of oxygenated blood to the brain until other procedures can be performed to restore the person's heartbeat and breathing.
PCR. PCR (short for Polymerase Chain Reaction) is a relatively simple and inexpensive tool that you can use to focus in on a segment of DNA and copy it billions of times over.rimers are short pieces of DNA that are made in a laboratory. Since they're custom built, primers can have any sequence of nucleotides you'd like. In a PCR experiment, two primers are designed to match to the segment of DNA you want to copy.