fig3

Figure 3. Schematic section following a vertical frontal plane of the recto-anal region showing the pair of magnets in profile (1) inserted between the muscular bundles of the internal (5) and external (6) anal sphincters, with the opposite polarities face to face attracting each other. Note: (2) mucosa; (3) rectal ampulla; (4) submucosa; (7) anus. From: Ref.^[34] (Reprinted with permission).