1.The Urinary System: the kidney, ureters, bladders, urethras. It takes the functions of excreting toxic substances from the body, regulating the metabolism of water and salt, maintaining balance of acid and alkali and keeping the physical environment in the body relatively stable.
The kidney has also the function of producing bioactive substances, such as erythropoietin and renin etc. Therefore, it is the most important and fundamental reflection region.
2.The Immune System: the lymph in the upper and lower body, the chest lymph, the spleen, tonsils, the thymus. It excludes invaded bodies from the outside and swallows bacteria to strengthen the body's immunity, which is a bodyguard of the health.
3.The Endocrine System: the hypophysis, the attached thyroid, the thyroid, the adrenal gland, the gonad and so on. It bears the secretion and regulation of all kinds of various trace elements and hormones for the entire body, and organizes the neurohumoral fluid and the conditioning system with the mutual regulation and restriction of the nervous system functions.
It plays a regulatory role in the important functions of the body, such as metabolism, growth, development and reproduction.
4.The Motion System: cervical vertebrae, thoracic vertebrae, lumbar vertebrae, sacral vertebrae, coccyx, and so on. It constitutes the basic contours of human beings with the functions of movement, protection of the internal organs and supporting the body.
