A type of tissue-specific stem cells Mature stem cells that are found in many adult organs and tissues (such as the brain and muscles). Unlike pluripotent stem cells, they can only produce the cell types found in the organ or tissue they inhabit. They're responsible for replacing cells that have been lost due to natural wear and tear, injury and illness throughout life; however, their ability to do so decreases with age. tissue-specific stem cells Mature stem cells that are found in many adult organs and tissues (such as the brain and muscles). Unlike pluripotent stem cells, they can only produce the cell types found in the organ or tissue they inhabit. They're responsible for replacing cells that have been lost due to natural wear and tear, injury and illness throughout life; however, their ability to do so decreases with age. found in the brain and spinal cord. These cells play a crucial role in the development, maintenance and repair of the brain and nervous system throughout a person's life.