stem cells

• embryonic stem cells:

  • form when egg and sperm cell fuse to form zygote
  • can differentiate into any body cell
  • could be used to replace pancreas cells in those suffering with diabetes etc.
• adult stem cells are found in bone marrow and can form many types of cells like blood cells
• meristems in plants:

  • found in root and shoot tips
  • can differentiate into any type of plant and have this ability throughout plants life
  • used to make clones
• benefits of stem cells:

  • used to replace damaged or diseased body parts
  • unwanted embryos from fertility clinics can be used
  • research into process of differentiation
• problems of stem cells:

  • we do not completely understand the process of differentiation so hard to control stem cells to form desired cells
  • removal of stem cells results in destruction of embryo
  • people may have religious or ethical objections as it interferes with natural process of reproduction
  • if a growing stem cells is contaminated with a virus, an infection can be transferred to the individual
  • money and time better spent into other areas