Last issue we looked back on the history of anatomy.

In this issue, we would like to talk about the components of our body, especially the systems of our body.

The human body can be divided into 10 parts from the appearance, and each part can be subdivided into several small parts. Important parts of the human body are: head (including cranium, face), neck (including neck, nape), back, chest, abdomen, perineum (after four parts collectively called the trunk cadres) and left, right upper limbs, and left, right lower limbs.

Cells are the basic units of the body. Cells and intercellular substance constitute organizations. The body's basic organization includes epithelial tissue, connective tissue, muscle tissue and nerve tissue. Several organizations together to form organs. According to different functions, many organs composes 9 systems respectively: motor system for movement of the body; digestive system for digesting food, absorbing nutrients and discharging metabolites; respiratory system for exchanging oxygen and carbon dioxide, and for endocrine function; urinary system for discharging water soluble metabolites, such as urea, uric acid, etc.; reproductive system for reproduction; vasculature for flowing cycle in the body; feeler for feeling the internal body and external environmental; nervous system for coordination and unity of each system and organ activities of human body; endocrine system for coordinating body organs activities of each system; immune system for protecting body from foreign matter like virus, bacteria and so on.

The same cells form the tissue, the same tissue forms the system, and the systems, like our loyal bannermen, help us perform the normal functions of the human body. All of these is so sophisticated and appropriate.

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