some important terms about stem cells.

1. Stem cells are unspecialized
cells that develop into the
specialized cells that make up
the different types of tissue in
the human body

2. • A)Self-renewal: This mechanisms exist to
ensure that a stem cell population is
maintained
• B) stem cells potency :Cell potency is a
cell's ability to differentiate into other cell
types .

3. • 1.Totipotent : The ability to differentiate into all possible
cell types.
• 2.Pluripotent: The ability to differentiate into almost all cell
types.
• 3.Multipotent : The ability to differentiate into a closely
related family of cells.
•
• 4.Oligopotent : The ability to differentiate into a few cells.

4. • The easiest way to classify stem cells is by dividing them
into two types: Early or embryonic and mature or adult.
1. Embryonic stem cells: Embryonic stem cells are self-
replicating cells that are potentially immortal They are
derived from embryos at a developmental stage before the
time of implantation would normally occur in the uterus.

5. • 2. Adult (somatic) stem cells:Adult stem cells
also called somatic stem cells, are stem cells which maintain
and repair the tissue in which they are found.

6. • Stem cell therapy is the use of stem cells to treat or prevent a
disease or condition. Bone marrow transplant is a form of
stem cell therapy that has been used for many years without
controversy

7. Stem cells are now helps in different
type of treatment
• Diabetes
• brain injury repair
• Spinal cord injury repair
• Heart infarction
• Restore vision
• Replace missing teeth
• Repair hearing

8. • Stem cell treatments may require
immunosuppression because of a requirement for
radiation before the transplant to remove the
person's previous cells, or because the patient's
immune system may target the stem cells.