A comparative histological study of the main features and function of animal cells, tissues and organs. The organisation of vertebrate tissues of organs into organ system. Techniques in histology. A survey of comparative animal embryology including gametogenesis, fertilization, cleavage, gestulation and organogenesis, embryo nutrition, effects of yolk on development in starfish; amphioxus, amphibians, birds and mammals. Mechanisms controlling growth and Development, metamorphosis and generation.