Dr. Zhijiang Chen's Physiology Theory - Book One Book one focuses more on the discussion of the four body energies; warm, dry, cold and moist. The warm yang property energy includes the solid shape of organs or tissues, and body fluids. The common solid shapes of organs or tissues are the physical heart, diaphragm, lung, adrenal gland (kidney is energy qi level, the warm property of kidney is much less than adrenal gland), liver, stomach, large intestine, gallbladder, brain, thyroid, ovary, uterus, and prostate. The common body fluids are artery blood, vein blood, human milk, stomach acid, large intestine, vaginal discharge, semen, and bone and joint fluid. Book one also introduces the new concepts of soul yang and conscious yang. The dry yang property energy includes solid material and gas or light material. The common solid dry yang property energies are potassium (heart), calcium (adrenal gland), sodium (kidney), iron (liver), and sugar (stomach). The common gas or light dry yang property energies are oxygen (lung), dry and low humidity air, sunlight, heat wave, and radiation. The cold yin property energy includes pancreas, gallbladder, liver, spleen, san jiao, and brain. The moist yin property energy includes saliva, pancreas fluid, small intestine fluid, bile, spinal fluid and lymph fluid. Book one will discuss all energy properties, characteristics, and functions. By better understanding the physiological condition, it is easier to understand the pathogenesis of the condition. By better understanding the various organ and tissue energy properties and ratio, it is easier to understand the properties of the pathogen. By better understanding the properties of the pathogen, it is easier to determine the root cause of the condition and determine a course of remedies for the root cause as well as the symptoms."