14- Structuring of the Vascular System_Notes

The embryonic vascular system develops in close relation with the vitelline vesicle, where Wolff-Pander islands form. This process is influenced by the amniotic cavity, which acts like a deflating "balloon", centralizing the peripheral circulatory system towards the median axis. This centralization is essential for differential growth, generating a suction movement that promotes the convergence of fluids towards the umbilical cord, the junction point between the embryonic pedicle and the vitelline vesicle.

The structuring of the venous vascular system is distinguished by its transverse development, in opposition to the arterial system which is longitudinal. Veins form from lateral germinations, integrating elements from various directions. This fluid integration movement contributes to the formation of a protective aura around zone B, essential for the construction of the cerebral system. The first cavity, the amniotic cavity, also marks the transition to the embryonic button, which will become the epiblast, highlighting the importance of the interconnection between the nervous system and zone B for effective treatment.