Urinary Bladder

The urinary bladder completes the work of filtering and releasing waste fluid. Western medical astrology places it in the region governed by Scorpio, the sign of elimination, and the older texts more often treat it by sign than by planet, which is a reminder that the two schemes, planetary rulership and zodiacal melothesia, were not fully reconciled. In Chinese medicine the bladder, pang guang, is the fu paired with the kidney and belongs to the water phase; the bladder meridian is the longest in the body, running from the inner canthus of the eye over the head and down the whole length of the back in two parallel lines to the little toe, and it carries the shu or transport points by which every one of the internal organs is treated from the back. The meridian is far more important in practice than the organ.

Ayurveda places the bladder, like the kidneys, under Apana Vata, the downward-moving subdosha responsible for the elimination of urine, and classical Ayurvedic surgery is unusually well documented for this organ: the Sushruta Samhita gives detailed instructions for removing bladder stones through perineal incision, a genuinely early description of a procedure recognisable as lithotomy, performed centuries before comparable techniques were recorded in the West. In Chinese medicine, noted above for the bladder meridian, the organ's fu classification places it among the lower yang organs; in Ayurveda by contrast the bladder, basti, is grouped among the hollow organs, the koshtha, a broadly comparable but independently developed distinction between hollow and solid viscera.

Sources Christian AstrologyWilliam Lilly with The Roots of Ayurveda: Selections from Sanskrit Medical WritingsDominik Wujastyk

The Bladder is one of the six fu, the hollow yang organs, and is paired with the Kidney in the Water phase. The fu are defined by their common function: they receive, transform and pass on, and unlike the zang they are described as filling and emptying rather than storing.

What Chinese medicine says the Bladder does is close to the western account and then extends past it. It receives the fluid the other organs have finished with and holds it until it is voided, which is unremarkable. The extension is that this is described as a qi transformation, dependent on the Kidney's yang, so that the tradition treats the Bladder's function as an expression of the Kidney's condition rather than as independent of it. Fu organs in this system are generally described in terms of the zang they pair with, and the Bladder is the clearest case.

Its channel is the longest in the body and carries the row of transport points that index all twelve organs, which gives the Bladder a prominence in practice out of all proportion to the function described here. That is treated on the Meridian's own page rather than this one.

The atlas records the western placement of the bladder under Scorpio in a separate article. Neither account asserts anything about urinary physiology, and nothing here is medical guidance.