Anatomy At the end of week 2 of development (day 14), what is the composition of the embryonic disk? A Epiblast only B Epiblast and hypoblast C Ectoderm and endoderm D Ectoderm, mesoderm, and endoderm 💡 Explanation At the end of week 2 of development (day 14), what is the composition of the embryonic disk? ✓ Correct Answer: B. Epiblast and hypoblast