This course offers an overview of the biodiversity and the process of biological evolution. Model organisms of biomedical sciences (C. elegans, Drosophila, Mus musculus) are used to study the internal and external structures. The embryology of mammals, with a focus on humans, will be discussed. During the classes laboratory animal science, the use and ethics of laboratory animals are clarified. Several experimental techniques such as housing, marking and immobilizing of laboratory animals, anesthesia, administration of candidate drugs, isolation of blood and urine as well as the possibilities of euthanasia are reviewed. Alternative models such as zebrafish embryos are mentioned as a replacement of mammals. During practical classes, some phyla important in an pharmaceutical context are illustrated: the identification of a flea versus a louse, hymenoptera and tick. The specifications of a mammal and the aspects of laboratory animal science are illustrated by the dissection of a mouse.