Fig. 2

Histological sections of the body wall stained by HE. a-c The epithelial layer of the body wall at the wound site on day-0 (a), -3 (b), and -7 (c) of regeneration. d-f The connective tissue layer of the body wall at the wound site on day-0 (d), -3 (e), and -7 (f) of regeneration. g-i The muscle layer of the body wall on day-0 (g), -3 (h), and -7 (i) of regeneration. el: epithelial layer; ctl: connective tissue layer; ml: muscle layer; cel: coelomic epithelial layer