inner cell mass

The inner cell mass is a group of cells located inside a very early-stage embryo called a blastocyst. These cells are important because they have the potential to develop into all the different tissues and organs of a human body. Essentially, the inner cell mass acts as a starting point for forming the entire organism, while the surrounding cells support and protect it. During pregnancy, the inner cell mass eventually grows into the baby, making it a critical component in early human development.