What is Gastrulation? The Three-Week Event That Builds Your Body Plan
Gastrulation: during Week 3 of human development, a flat two-layer disc becomes a three-layer embryo. Every organ in your body traces back to this transformation. “It is not birth, marriage, or death, but gastrulation which is truly the most important time in your life.” — Lewis Wolpert, developmental biologist What is gastrulation? It’s the brief…