Name 3 of the 4 characteristics of stem cells.
- may proliferate extremely well
- may differentiate into several (at least 2) different cell types
- may reconstitute tisues after injury
Totipotent cells give rise to ALL cells of an organism, including embryonic and extaembryonic tissues (cells which support embryonic development).
- A zygote is totipotent
Pluripotent cells give rise to all cells of the embryo and subsequently adult tissues. (Embryonic stem cells)
Multipotent cells give rise to different cell types of a given lineage (adult stem cells)
Which cells could also be called embryonic stem cells?
Which cells could also be called adult stem cells?
Name 3 of the 4 characteristics of embryonic stem cells.
- dervied from the inner-dell mass of a blastocyst
- pluripotent, differentiate to all cell lineages
- technical and ethical limitation
- may be induced from adult tissues
Name 2 of the 3 characteristics of adult stem cells.
- Harvested from mature organs/ tissues (bone marrow)
- more restricted ability to produce different cell tpes and to self-renew
what are some characteristic of hematopoiesis during 2-8 weeks of gestation?
- blood islands are found in the yolk sac wall
- nucleated erythrocytes are present
- no leukocytes
What are some characteristic of hematopoiesis during