Anxiety can be defined as emotions which are typically negative in nature. It will often consist of fear and worry, and some organisms may even experience physical signs such as nausea or chest pains. Anxiety is a complex emotion, and is composed of a number of different elments. Some of these elements are somatic or cognitive, and the body will prepare itself to deal with an external threat. The heart rate speeds up, and the blood pressure is increased. The various muscles in the body will also receive elevated levels of blood. At the same time, the functions of the digestive system will slow down.
People who have anxiety will generally have a sense of dread. A number of voluntary and involuntary processes will take place in the body, and the goal of these processes is to get the organism away from the source that is causing it to have anxiety. Anxiety is an important emotion, and is designed to increase the survival rate of organisms. In humans it appears that anxiety comes from the hippocampus and amygdala, two regions of the brain. When a person senses bad odors or tastes, there will be a large amount of blood flow which will be present in the amygdala. The evidence...