undifferentiated cells that has ability to renew and differentiate

1. STEM CELLS

2.  Unspecialized cells that has the ability to continuously
divide to produce more stem cells
 Undifferentiated cells are able to become tissues or organ
with specific functions
INTRODUCTION

3.  Two properties
I. Self renewal
II. Potency
Self renewal is the ability to go through cycles of cell division
maintaining undifferentiated state
Potency is the capacity to differentiate into nearly all cell types
PROPERTIES

4.  Embryonic stem cells
 Adult stem cells
 Umbilical cord stem cells
TYPES OF STEM CELLS

5.  Derived from inner cell mass of blastocyst (4-5 days post
fertilization)
 Give rise to three primary germ layers
 Give rise to more than 200 cell types of adult body when
given sufficient and necessary stimulation for a specific
cell type
EMBRYONIC STEM CELLS

6.  Maintain and repair the tissue in which they are found
 Accessible sources in humans are
I. Bone marrow
II. adipose tissue
III. Blood
ADULT STEM CELLS

7.  Stem cells can also be taken from umbilical cord just after
birth
UMBILICAL CORD STEM CELLS