The stress response of the body a bit ‘as we prepare to launch a plane takes off. Almost all of the system (heart and blood vessels, immune system, lungs, digestive system, sensory and brain) and amended to cope with market risk.
External pressures, including negative (such as pain or hot or cold) or pressure (for example, poor working conditions or abusive relationships) psychological environment of material conditions. Humans, like animals, you can experience the external pressure.
The internal pressure can also be physical (infection, inflammation) or psychological. Examples of psychological stress is internal damaging events may or may not experience problems intense.

How anyone can say that the internal psychological pressure is rare in most animals, besides the absence of humans.
Different types of stress
Specific phobia: This is a particular object or (more…)