Stem cells allow organisms like hydra, planaria, and salamanders to regenerate body parts. But, not all stem cells are totipotent, that is , able to differentiate into every type of cell in the body. Pluripotent stem cells can form most, but not all cell types, while multipotent stem cells can form a limited set of cell types . 3. The marrow inside the bones of a rabbit's leg contains stem cells However, rabbits cannot regenerate an entire leg if gets severed. Why type of stem cells do you think are in a rabbit's bone marrow?