Like the fu organs morphology, the extraordinary fu-organs are mostly hollow but not the pathways for the digestion and excretion of cereal food and, like the zang argans functionally, they also store essence-qi.

• 它在形态上与六腑相似，大多为空，但不是水谷消化和排泄的通道；在功能上与脏相似，它们也可藏精。