Fig. 3From: Regeneration of the digestive tract of an anterior-eviscerating sea cucumber, Eupentacta quinquesemita, and the involvement of mesenchymal–epithelial transition in digestive tube formationStages of regeneration. Based on the internal morphology of regenerating animals, we defined four stages of regeneration, stages I to IV, and schematic diagrams of each are shown. Blue broken line: the edge of mesentery without regenerating tissues; yellow colored area: regenerating tissues (gut rudiment)Back to article page