In psychological studies It is very important to understand the behavior of human beings to express any behavior that comes out is because the system of the body. Whether philosophers and scientists. The studies and research, as long as there are opinions that. Human, animal or plant shall have a structure that is composed of the smallest unit that does. Can be seen with the naked eye until the biggest constituent. Each section will have a working relationship. Without any parts that can function independently, except blood. Estimated that 75 to 80 percent of adult body consists of water. The rest are chemical compounds. These compounds as well as hundreds of cell types, which is the basic unit is the smallest of the body. Human beings are The structural complexity among living things on earth. The average human body contains cells 80-100 trillion cells, each series is determined to grow and act locally. The same kind of cells forming a tissue (tissues) multiple tissue types when working together. Called organ (organ) on each organ collaboration system called (system) can be illustrated by the following chart
so. When the cells were grouped into tissues such as muscles, nerves, bones, etc. These tissues work together as organs and eventually these organs are. The allocation system of the body such as muscle, various glands and nervous system. So different systems in the body, various systems in the body are working closely together so that human beings can live a normal function of the body. May be classified into the following 10 systems.
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