popliteal artery: a continuation of the femoral artery that branches to supply the legs and feet
artery: a blood vessel that carries blood from the heart to the body
survivor guilt: a deep feeling of guilt often experienced by those who have survived some catastrophe that took the lives of many others; derives in part from a feeling that they did not do enough to save the others who perished and in part from feelings of being unworthy relative to those who died