What type of stem cell is capable of giving rise to an entire organism?

Totipotent stem cells are unique in their ability to develop into an entire organism. This type of stem cell has the potential to differentiate into any cell type, including both embryonic and extra-embryonic tissues, which are essential for forming the various structures necessary for development.

Totipotent stem cells are present only during the early stages of embryonic development, specifically within the first few divisions after fertilization. As the embryo develops, the stem cells become more specialized and lose the totipotent capability, transitioning into pluripotent and then multipotent stem cells, which have more limited potential for differentiation. Understanding the significance of totipotent stem cells provides insight into the early stages of life and the fundamental mechanisms of development.