In 2015, 53 percent of refugees worldwide originated from Somalia, Afghanistan, and Syria.  In a Global Trends Report by the UNHRC, approximately 65 million people around the world have been forced from their home.  Out of this number, million are refugees, over half of the demographic under the age of 18.  Some of the top countries absorbing these displaced peoples are Pakistan ( million), Lebanon ( million), and Turkey ( million). In times of violence, people are displaced from their homes and seek places where they are welcome, periodically meeting places they are not welcome.
The heart and blood vessels comprise the two elements of the cardiovascular system that work together in providing nourishment and oxygen to the organs of the body. The activity of these two elements is also coordinated in the body's response to stress. Acute stress — stress that is momentary or short-term such as meeting deadlines, being stuck in traffic or suddenly slamming on the brakes to avoid an accident — causes an increase in heart rate and stronger contractions of the heart muscle, with the stress hormones — adrenaline, noradrenaline and cortisol — acting as messengers for these effects. In addition, the blood vessels that direct blood to the large muscles and the heart dilate, thereby increasing the amount of blood pumped to these parts of the body and elevating blood pressure. This is also known as the fight or flight response. Once the acute stress episode has passed, the body returns to its normal state.