 Yin and yang concepts were applied to the feminine and masculine aspects of all bodies at large, implying that in nature the differences between men and women begin at the level of this energy flow.According to "Bequeathed Writings of Master Chu" the male's yang pulse movement follows an ascending path in "compliance [with cosmic direction] so that the cycle of circulation in the body and the Vital Gate are felt...The female's yin pulse movement follows a defending path against the direction of cosmic influences, so that the nadir and the Gate of Life are felt at the inch position of the left hand".In sum, classical medicine marked yin and yang as high and low on bodies which in turn would be labeled normal or abnormal and gendered either male or female.