Movie 10.

Virtual dissection of the tailbud in the CWS model. Movie showing the effect of tailbud removal in a simulation using the Clock and Wavefront Self-Organizing model (Fig. S20A). Following the separation of the posterior region, the tailbud continues to grow and to generate new phase waves that travel anteriorly. In the anterior dissected part, preexisting phase waves persist and propagate anteriorly, driven by the excitable behavior in the intermediate region (light gray section), until they stop when entering the bistable region (dark gray section). These findings align with experimental observations reported in Özelçi et al. (2022). Importantly, in the anterior dissected part, the propagation of straight waves without rotational movements occurs independently of the homogeneous oscillations at the posterior tailbud tip.