Organization of Metabolic Fields

Embryonic development begins with the formation of an embryonic knob and a cavity, the blastocoel. During implantation in the uterine lining, a new cavity emerges, marking the exchange between different cells, notably the endocyst, the epiblast, and the hypoblast. At this stage, the appearance of a third chamber leads to differential growth between the inside and the outside, influenced by trophic input. This process is organized by metabolic fields that include mechanisms of precession, permeation, parmeation, and infusion, essential for the distribution of trophic information within embryonic tissues.

Trophic information becomes more specific through the emergence of structures such as the vitelline cavity, the amniotic cavity, and the external coelom, thus forming an embryonic pedicle. The latter allows for an oriented distribution of information, which manifests in three modes: the parmeation field, where information moves along membranes; the permeation field, which allows passage between cells; and the infusion field, where the cell directly absorbs information. This mechanism is crucial for the transition from zygote to primitive fetus, promoting a concentration of trophic information and establishing the foundations of the placenta. The dynamics of these metabolic fields contribute to the formation of an S-shape structure, resulting from a coordinated movement of the amniotic and vitelline cavities, and highlights the importance of an accurate representation of embryonic dimensions for an adequate understanding of these processes.