Details: Yang Guifei, the goddess of beauty, met her demise through drowning while wearing her kimono, a consequence of water entering her lungs.
The failure initiated in the lungs and progressed to the medulla, the brain’s respiratory control center. The final stages led to the survival of brainstem reflexes, which adapt the body to sudden environmental changes.
The merging of the medulla and reflexes symbolizes the beginning of the end.