There are several types of stem cells used in research:
1. Embryonic Stem Cells (ESCs): Derived from early-stage embryos, these cells can differentiate into any cell type, making them highly versatile but ethically controversial. 2. Adult Stem Cells: Found in various tissues such as bone marrow and fat, these cells are less versatile but less ethically contentious. 3. Induced Pluripotent Stem Cells (iPSCs): These are adult cells that have been genetically reprogrammed to an embryonic stem cell-like state, providing a less controversial source of pluripotent cells.
