The sacral plexus, called Root-Centre (MULADHARA-CAKRA) or Secret Place, being the root of all streams of vital energy (NADIS) in the region of the rump-bone or sacrum.

• 荐骨（血管，淋巴，神经等）丛，称为根部的中心（根轮）或者秘密的地方，是所有生命能量流（气脉）之根，在骶骨或者荐骨附近。