 The zàng-fǔ () constitute the centre piece of TCM's systematization of bodily functions.Bearing the names of organs, they are, however, only secondarily tied to (rudimentary) anatomical assumptions (the fǔ a little more, the zàng much less).As they are primarily defined by their functions, they are not equivalent to the anatomical organs–to highlight this fact, their names are usually capitalized.