In a revolutionary departure from traditional concepts of human differentiation, this solume refutes Haeckel's biogenetic law and offers a perspective of the developing embryo as a single unit rather than as a number of isolated parts.

Basing its information on important new knowledge of the three-dimensional organization of metabolic fields, this groundbreaking study warrants reading by thoughtful professionals in a number of fields concerned with embryonic differentiation.

It will particularly interest anatomists, developmental physiologists, biologists, specialists in experimental medicine and all those occupied with the study of malformations.