Vols. for 1942- include proceedings of the American Physiological Society.Thus, the lower portions of the crypt cell columns were labeled shortly after incubation of rectal biopsy specimens with H3TdR. ... The following flow diagrams can be used to illustrate these situations. ... 4.B and C with an increased mitotic index. In Fig. 4.4, the per cent of cells in each phase of the proliferative cycle is shownanbsp;...