| A | B |
| stem cells | undifferentiated cells |
| meristem | where plant stem cells are found |
| embryonic stem cells | cells of an early stage embryo |
| stem cells can | produce any kind of cell |
| adult stem cells can | only produce the type of cell that is in the tissue around them |
| adult stem cells in human tissue | allow tissues to grow and replace old/ damaged cells |
| blood stem cells | are found in bone marrow of long bones |
| stem cells can be used | to treat some diseases |
| function of stem cells in bone marrow | to produce new blood cells |
| cancer and rejection | are problems caused by using stem cells |