Fig. 1: Developing mesentery.
a Photograph of a digitally reconstructed mesentery (yellow) at Carnegie stage (CS) 13. a1–4 Photomicrographs at levels indicated. b1–3 Photographs of the reconstructed mesentery at CS 16. b2, 4 Photomicrographs of sections at levels indicated. c1–4 Photographs and photomicrographs of mesenteric regions at CS16. d1–2 Photographs and photomicrographs of the anterior aspect of the mid-region fold. Photographs demonstrating anterior (e) and posterior (f) aspects of the mid-region at CS 16. g–l Photographs showing anterior and posterior aspects of the developing mid-region. m–o Schematic depiction of the mid-region switch.
