- Created by: maddiesmith41
- Created on: 13-05-20 18:45
Early Embryonic Development:
- after 3 cycle the cell is now totipotent - can give rise to any cell type.
- by 5 days cell is now a blastocyst - a cluster of inner cell mass (which forms the embryo).
- the outer layer of the blastocyst then forms the placenta.
- the blastocyst cells are now pluripotent - can give rise to several cell types = human!
- most of the cells forming the embryo become differentiated - undergone maturation to become distinct in form and function (is now speciaised!).
- some cells will remian multipotent - can only give rise to limited cell types e.g. adult stem cells.
- cell differentiation is irrevirsable in animals but not in plants.
- plant cells are also totipoetent - produced via tissue culture.
- involves growing tissues in an artificial medium (which is seperate from the organism).