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How Stress Affects the Body

Our lives are full of different happy and unhappy events. These circumstances play a great role in controlling the human body and our mood. Happy events give us strength and inspiration, while unhappy events give the feeling of depression. The dangerous thing is that this depression may cause stress. Stress is a natural part of life. Everybody experiences it. When you're under stress, your body changes. A little stress is OK, even exciting; however, if you are constantly under stress, it can weaken your immune system and bring emotional and mental problems.

When you are under stress your body undergoes different physical changes. Firstly, the hypothalamus, or "master gland" pumps hormones into the blood stream. The Hypothalamus is a gland the size of grape which is located in the center of the brain. This gland's functions are storing hormones, providing connections between glands in all the parts of the body, and sending messages to the nervous system. When you are emotionally involved in something, the hypothalamus, and all other glands connected to it, began producing more hormones than usual. As a result, your pulse quickens, blood pressure rises and breathing speeds. Muscles become tense and the liver's work in turning sugar into energy slows. These changes in your body bring some health problems.

Too much stress affects the human immune system, weakening it and making us more susceptible to colds, coughs and infections. Scientists have found that stress is a main reason for arthritis and asthma. Your urinary tract can also be affected. There is a natural balance of friendly and unfriendly organisms that normally co-exist in our digestive and urinary systems. Constant anxiety can destroy this, leading to an overgrowth of the harmful bacteria and an infection.

The psychological effects of stress are perhaps more noticeable than its physical effects. When you are stressed, your emotions are often intensified. You may get irritated at the smallest things, start crying when watching a romantic comedy, or laugh uncontrollably at something your mother tells you.

Sometimes it is very difficult to control your feelings. In short, to much stress effects our body physically, emotionally leading our lives to ruin step by step.

X-Rays

X-rays are penetrating electromagnetic radiation that have the shorter wavelength than light. They were discovered accidentally by a German physicist, William Concord, Roentgen in 1895. While studying cathode rays, he noticed that a metallic screen placed nearby emitted fluorescent light. After experimenting further, Roentgen determined that fluorescence was caused by invisible radiation of a more penetrating nature than ultraviolet radiation. He named the invisible rays "X-rays" because of their unknown nature. Later X-rays were known also as Roentgen rays in his honor.

X-rays have had many practical uses. They are used in medicine as a means to photograph fractioned bones and head traumas. Space agency use X-rays to send communication signals toward distant solar systems. X-rays have even served to heat canned food, but this is not recommended.

Actually, X-rays are dangerous. Exposure to X-rays has been linked to certain types of cancer. That's why dentists go into other room when they take picture of your teeth. In many cases, X-rays have been replaced by more benign technologies, such as ultrasound and microwave.