Movie 6.

Timelapse confocal imaging of the developing caudal venous plexus of a laterally mounted rasa1^-/- Tg(kdrl:mCherry) embryo from 24-30 hpf. Imaging was performed with 15 min intervals and shown at 2 fps. Note the cavernous AVM at the posterior of the tail, partially filled with stagnant blood.