21. It did keep them from forming normal embryonic tissues, leaving them as large, yolk-filled cell masses . 22. However, ultimately, the inner cell mass , inside the trophoblast layer, is aligned closest to the decidua. 23. Htt aggregation decreases beta cell mass and thus impairs insulin release and increases blood glucose levels. 24. The cell mass then grows into root-like threads through the host, centering on the digestive system. 25. These embryos were of poor quality, lacking a substantial inner cell mass and poorly constructed trophectoderm. 26. The stem cells are part of an inner cell mass within an embryonic sphere called a blastocyst. 27. Inside the sphere is a blob known as the inner cell mass , which contains the stem cells. 28. As the syncytiotrophoblast starts to penetrate the uterine wall, the inner cell mass ( embryoblast ) also develops. 29. The inner cell mass , the embryoblast, begins to transform into two distinct epithelial layers just before implantation occurs. 30. This loss of beta cell mass eventually leads to a loss of most of the transplanted beta cells.
