This book aims to help students acquire a structured body of knowledge that provides a reference point for newly observed phenomena and enables them to place newly acquired knowledge in its proper context. Karl Jaspers. This book is intended for pharmacy students in the second phase of their studies according to the licensing regulations for pharmacists in the Federal Republic of Germany, effective August 23, 1971, with careful consideration of the subject catalog created by experts at the Institute for Medical and Pharmaceutical Examination Questions in Mainz. The book is published in two parts, a general and a special one (Heidelberger Taschenbücher, Volume 205). In no other area of pharmaceutical education have the teaching contents changed as significantly as in biology, which is also reflected in the change of name.