Fig. 4.

Development, structure and cell type composition of adult (a, b) or juvenile (c, d) mesenteries of the sea anemone Nematostella vectensis. a, b Schematic cross-section of adult mesenteries at gonadal (a) and non-gonadal (b) levels. c Schematic development and fate map from gastrula stages until juvenile polyp. All schematics represent longitudinal cross-sections except lower right (cross section). d Schematic representation of exocrine (dotted yellow) and phagocytic (purple) tissues in juvenile Nematostella polyps. Upper and lower left schematics are cross-sections while lower right schematics is a longitudinal section. Cil: ciliated; epid.: epidermis; m. muscle; ret.: reticulate; interm.: intermediate