B1 - Stem Cells

• Stem cells


  Cells that can divide by mitosis to form more cells and can differentiate into specialized cells
• Stem cells


  • Can divide by mitosis to form more cells
  • Can differentiate into specialized cells
• Human life starts


  1. Sperm cell fertilizes egg cell

  2. Forms a single cell called a zygote

  3. Zygote divides by mitosis over and over again

  4. Forms a small group of cells called an embryo

  5. Embryonic stem cells can differentiate into any type of cell
• Embryonic stem cells


  Stem cells found in the embryo that can differentiate into any type of cell
• Adult stem cells


  Stem cells found in adults that can only differentiate into a narrow range of cells
• Adult stem cells


  • Stem cells found in bone marrow that can only differentiate into different types of blood cells
• Plant stem cells


  Stem cells found in plant tissues called meristems that can differentiate into all the cells and tissues the plant needs
• Plant stem cells persist for the plant's entire life, unlike embryonic stem cells which disappear by the time we're fully developed