The following is from Chinese Medical Qigong Therapy, Volume 1, by Professor Jerry Alan Johnson, The Internal Institute of Medical Qigong, Pacific Grove CA, 2005     The above referenced work is a must for anyone interested in traditional Daoist esoteric anatomy. Through years of reading and study I managed to get large parts of the most important information scattered among a dozen books. This book is much more convenient and a real bargain in comparison to the amount of money I expended over that time.   As before I have bolded certain sections in the hope that I will be able to reference them in some future posts explicating this material.