“triple warmer” is a large bowel containing all the
internal organs.如明‧張介賓說:「三焦者,確有一腑,蓋脏腑之外,軀殼之內,包羅諸脏,一腔之大腑也。」
For instance, Zhang Jiebin, a medical man in the Ming dynasty, said, “Triple warmer is, in fact, a bowel. It is outside all the viscera and bowels but within the body, contains all the other organs and is the largest bowel within the body cavity.”