osmosis
/ɒzˈməʊsɪs/
noun
  1. BIOLOGYCHEMISTRY
    a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.
  2. the process of gradual or unconscious assimilation of ideas, knowledge, etc.

osmosis. 

as skin meets water, schorr traces the fragility and resilience of the human body.