Shedding Begins  - Dynamic mass is reduced.  However, before parts die, essential elements are recycled from the dying parts back to the still living seesaw.  As age increases and shedding continues to decrease the size of the living seesaw, the E side forms sprouts that help keep the E side still slightly heavier than the R side.  When the time comes that E and R do approach balance and further adjustments cannot be made, the pathogens enter and do what they have been designed to do.  The seesaw analogy also fits well for topping, and removal of living wood in the crown of maturing trees, and many other man-made mistreatments.  

[Diagram from MA page 249]

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