Remain in G0, regenerate from stem cells
PERMANENT neurons skeletal cardiac muscles RBCs
Enter G1 from G0 when stimulated
STABLE (QUISCENT)
hepatocytes
lymphocytes
PCT
periosteal cells
Never go to G0, divide rapidly with a short G1
MOST AFFECTED BY CHEMOTHERAPY
LABILE
bone marrow gut epithelium skin hair follicles germ cells