The cartoon represents a regenerating trunk and the squares display the region analyzed at the anterior "A" and posterior "P" blastemas. The images are TUNEL maximum projections of representative blastemas from 72 hours and 4 days regenerating trunks in starved conditions. The dashed line delimits the body of the planarian. The graph shows the number of TUNEL+ cells per mm2. The differences in cell death are not significant (n.s.) at 72hR (two-tailed Student's test with equal sample variance) and significant (***P < 0.001 using two-tailed Student's test with equal variance) at 4dR. n ≥ 5 planarians per condition. 