Your body can't have a situation when masses of cell - disrupting, body - aging, and cancer - causing agents are flowing through the body. (supernaturalacnetreatment.com)
In the photo, the embryonic stem cell colonies are the rounded, dense masses of cells. (science.howstuffworks.com)
These illustrations can take you on a wonderful journey from the tiny mass of cells to the fully developed baby you will have at the end of 40 weeks. (newkidscenter.com)