The idea of a super-controller overseeing hierarchies of lower subservient controllers exists in biology, cybernetics and the computer sciences. Teasing control systems apart from what they manage can reveal new patterns of control. Control of the hemo-coel remains unstudied but probably contains useful secrets.

A hemocoel's local politics are unique. Control of the inputs and outputs of the hemocoel occurs simultaneously distributed over the entire space of the hemocoel along any open boundaries where cells contact hemolymph and entry and exit 'choices' occur. Individual entries and exits do not obstruct flow of hemolymph within the hemocoel. Compare a hemocoel with the filling and emptying of a football stadium as flowing crowds congest entries and corridors where each person's choice feeds back to change what the group does.

Seen from a higher perspective, sites of absorption and elimination from organs and cells are not the meta controllers for what enters and leaves each organ, but together, we might imagine a super controller directing all these sites, so that together orchestrated separate controllers might coordinate the hemocoel-system. Each cell and organ probably controls its own surfaces and receptors, individually responding to immediate local demands for metabolites and excretion without requesting outside information filtering down to each control point from a distant central processor.

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