Complex phenomena, such as the transitions that surgeons make from stage to stage throughout their career and the impact of these transitions on lifelong learning, can only be understood through a process that involves in-depth exploration#in this case, actual experiences of real surgeons as to how [...]

This thorough revision of "Invertebrate Zoology" provides a survey by groups, emphasizing adaptive morphology and physiology, while covering anatomical ground plans and basic developmental patterns. The most modern evolutionary research is included.[...]