Skip to main content
. Author manuscript; available in PMC: 2013 Oct 4.
Published in final edited form as: Conf Proc IEEE Eng Med Biol Soc. 2012;2012:5502–5505. doi: 10.1109/EMBC.2012.6347240

Fig. 2.

Fig. 2

(A) Division types of stem cells and progenitor cells. Red sphere labeled with (S) indicates stem cells, blue sphere (P) indicates progenitor cells, and white sphere (D) indicates differentiated cell. The same color code is used for illustration of resulting tissues. (B) Feedback controls of stem cell model. Blue arrows indicate self-renewal or proliferation divisions. Black arrows indicate symmetric divisions. Red arrows indicate asymmetric divisions. Flat-head arrows extending from differentiated cell with corresponding colors indicate inhibitions to respective type of divisions.