The emotion of fear sets off many changes in your body. When you become frightened,
you breathe more deeply, giving your muscles more oxygen and greater energy. Your heart
beats more powerfully so that your blood circulates faster, carrying oxygen to all parts of your
body. Your stomach and intestines no longer contract and all digestive action stops. No saliva
flows in your mouth and your throat becomes dry. Your face becomes pale because the tiny
blood vessels shrink under the skin so that less blood would flow if you were cut. The blood can
clot faster so that there would be less bleeding from a wound. The pupils of your eyes enlarge,
admitting more light during the emergency. You might be able to perform great feast of
strength in this condition. The emotion of fear has a very strong effect on the body.