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Simulation of the gut flora of a zebrafish larva. (a) Three-dimensional geometry of the intestine. (b) Pressure distribution and velocity vectors. White arrows, retrograde and anterograde peristalsis. (c) Nutrient distribution. (d) Bacterial distribution without taxis. (e) Bacterial distribution with taxis. Reproduced with the permission from Yang et al., J. Theor. Biol. 446, 101–109 (2018). Copyright 2018 Elsevier.
