About This Book
A popular scientific treatment of human embryology that follows development from the fertilised ovum through cleavage, gastrulation, germ-layer formation, coelomogenesis, fetal membranes, and organogenesis. It presents historical and modern embryological theories, including the gastraea and germ-layer concepts, and insists on a close causal link between ontogeny and phylogeny, arguing that embryonic stages reflect ancestral forms. The text examines cell division, conception, and comparative anatomy, and discusses the evolution of structures and functions—with extended consideration of circulation and the nervous system—to show how physiological and anatomical development illuminate the successive emergence of higher mental capacities.
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