Fig. 3

Regeneration capacity of M. lignano. In all worms, the green dots represent neoblasts. a Anterior regeneration is limited to the rostrum, the region anterior to the eyes and brain. b, c Posterior regeneration is characterized by the formation of a blastema, an accumulation of proliferating neoblasts, which forms within 48 h after amputation. b In case of whole-body amputation, regeneration and remodeling of the remaining tissues of the head will result in a complete but small worm. This worm will then grow into a full adult with new gonads. c After amputation of the tail, the missing tissue will be regenerated within a week