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- Each of the 12 regular meridians has one collateral branching out from a point called the “Luo-connecting point” on the four limbs.
- The Spleen has major collaterals distributing on the side of the trunk.
- Also, the Du and Ren meridians have their collaterals respectively. The Du collateral distributes on the back and the Ren on the abdomen.
- Each of the collaterals has a Luo-connecting point pertaining to the meridian from which it derives.
- The 12 regular collaterals run to Biao-Li related meridians mutually.
- They run superficially in the body and have many smaller branches and sub-branches called Minute Collaterals
and Floating Collaterals 
.
- Function: to strengthen the association of meridians and transport Qi and blood to the body surface.
