Tag: chorion

This detailed diagram illustrates the critical early stages of human embryonic development, focusing on the formation and differentiation of the germ layers—ectoderm, mesoderm, and endoderm—following gastrulation. Understanding these fundamental processes is essential for comprehending how a single-celled zygote ultimately gives rise to the complex array of organs and systems that constitute a complete organism. This image provides a clear visual representation of the embryonic structures and their respective contributions to the developing fetus, highlighting the intricate orchestration of cellular migration and specialization during the third week of gestation and beyond.