s; <U>Skeletal and muscular systems</U> have been generalized to
include the cytoskeleton and other purely intracellular systems and structures;
Analogous generalization of the <U>nervous system</U> to include equivalents
in unicellular organisms--and perhaps plants--may be imminent; Concepts
of <U>star and galaxy</U> should perhaps be generalized to include one
another--since stars (as superstars) may equal or exceed (dwarf) galaxies
in size; The progressive generalization of the concept of number in the
h