Key features integrated approach: descriptive morphological & experimental physiological approach. The connection between inheritance (genetics) and development (embryology) explained throughout text. New addition, part nine: "theory of development-a recapitulation" about the book: an introduction to embryology embryology is a branch of biology which has the most immediate bearing on the problem of life. It is often referred as development biology. An introduction to embryology, presents embryology as a single science in which the descriptive morphological approach and experimental physiological approach are integrated and both contribute to the understanding of the ontogenic development of organisms. Contents part one: the science of embryology the scope of embryology and its development as a science part two: the genetic background the eukaryotic genome and its mode of operation part three: gametogenesis spermatogenesis oogenesis the development of egg and the environment part four: fertilization and the beginning of embryogenesis fertilization cleavage part five: gastrulation and the formation of the primary organ rudiments morphological aspects of gastrulation and primary organ formation diversification of embryonic parts and its control during gastrulation and primary organ formation creation of form during gastrulation and subsequesnt development embryonic adaptations and the development of mammals part six: organogenesis general introduction to organogenesis development of the ectodermal organs in vertebrates development of the mesodermal organs in vertebrates development of the endodermal organs in vertebrates part seven: growth and differentiation growth differentiation part eight: morphogenetic process in the later part of ontogenesis metamorphosis regeneration asexual reproduction part nine: theory of development- a recapitulation - from Amzon