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Fig. 5 | Zoological Letters

Fig. 5

From: Regeneration of the digestive tract of an anterior-eviscerating sea cucumber, Eupentacta quinquesemita, and the involvement of mesenchymal–epithelial transition in digestive tube formation

Fig. 5

Histology of the tissues at stage I. Cross sections of the body at stage I (0 dpe) were stained with TB, mainly focusing on the anterior (a-d) and posterior (e, f) mesenteries. b, d and g are high-magnification views of the boxed areas in a, c and f, respectively. a, b Anterior tissue, posterior to the anterior rudiment. c, d Anterior tissue posterior than a and b. The gonadal duct remains in the mesentery, but no structures are present at the free end. e Posterior tissue. The cloaca and the body wall are connected by the mesentery. f, g Posterior tissue, anterior than e. In b, d and g, no tubular structures nor developed cell mass are observed at the free edge of the mesentery (arrowhead). bw, body wall; cl, cloaca; gd, gonadal duct; lm, longitudinal muscle; mes, mesentery; wvs: a part of the water vascular system (radial water canals, etc.). Arrowheads indicate the free edges of the mesentery. Scale bars 500 μm in a, c, e; 200 μm in f; 50 μm in b, d, g

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Zoological Letters

ISSN: 2056-306X

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