ah: tension, resistance
choo: release, submission/surrender
top corners: tension in birth, release in death. It should make more sense in the context of the series the print will ideally be viewed in, in which the newborn's wail and the last breath are contrasted as more sensible visual examples of tension and release. I felt they emphasized the cyclic nature of tension/release well enough as-is, though.
rest of the symbols should be self-explanatory