Chinese traditional medicine considers that “blood” and “qi” (chi; vital energy) circulate throughout the body in channels and colla- terals and that these passageways (59_, according to Felix Mann) (2) form a network connecting the superficial and interior portions of the human body, regulating the function of the whole body. Chan- nels are the main trunks running lengthwise, while the collaterals aretheirbranches. Channelscanbeclassifiedintotwogroups:
1) regular_, and 2) extra (3). The 12 regular channels are the meridians we TFH Instructors are familiar with when we work with the wheel. The Chinese consider the eight extra channels to be different from the 12 channels as they were not known to be related to any of the internal organs. \ie are also familiar with two of these eight extra channels: the central (conception vessel) and governing (governing vessel) meridians which run along the middle of the body and have their own acupuncture points.