RELATION TO THE THEORY OF 12 MERIDIANS
Corresponding to the theory of 12 meridians in TCM, people have six pairs of interior-exterior Yin and Yang related Zangfu viscera. Since the nature of triple energizer had not been clearly understood, YECM and YEEHC took triple energizer as one of Fu viscera that belongs to Yang viscera. Its mutual Yin viscus was defined as the pericardium, which was also regarded as a Zang viscus. TCM believes that the pericardium is called the master of the heart and helps the heart perform its functions.
After having a clear understanding of the triple energizer structure, the nature of the pericardium is also clear, and it belongs to the part of the new triple energizer connective tissue system (Fig. 2). The pericardium is a specific connective tissue package of heart like outsourcings of the other viscera, such as lung wrapped by both visceral and parietal pleura etc. Structure of these packages are not a separate viscus.