Ask AI: Draw diagrams illustrating the different events that occur in week 2 of embryological development

As an AI text-based digital assistant, I'm unable to draw diagrams. However, I can describe what occurs during the 2nd week of embryological development. 1. **Day 8:** The fertilized egg (Blastocyst) implanted in the uterus begins to divide and differentiate. It forms the embryoblast (which develops into the embryo) and the trophoblast (which develops into the placenta and protective/supportive structures) 2. **Day 9:** The trophoblast starts producing finger-like projections (microvilli) that invade and secure the blastocyst to the uterine wall. Inside, the embryoblast begins its division into two layers: the hypoblast and the epiblast. 3. **Day 11-12:** These two layers form the bilaminar disc. The space above the epiblast will form the amniotic cavity. Below the hypoblast, the yolk sac forms. 4. **Day 13-14:** The uterine stroma grows over and surrounds the implanted blastocyst forming decidua. Cells from trophoblast differentiate into syncitiotrophoblast and cytotrophoblast and start to invade the uterine wall deeply, setting the stage for the development of the placenta and umbilical cord. You may want to consider sourcing an embryology textbook or reliable online resources for detailed diagrams of these processes.