THESE ARE A FEW ANIMATIONS FOR THE PRESENTATIONS IN SECOND LIFE

This is an in vivo image of an embryo at the stage called "neural crest" The embryo has folded, the folds have an "8" shape, and begin to collide
This is an in vivo movie of 3 hours of collision of the folds, and below, the cell tracking at this time, just prior to the collision, and just after the collision. It shows the transition between a dipolar flow, and a quadrupolar flow.
Top. PIV tracking of the movement prior to the collision of the head fold, please notice the dipolar structure.

Bottom. PIV tracking of the movement just after the collision of the head fold, please notice the quadrupolar structure

This is an in vivo movie of the continuation of the descent of "Hensen's node", and below, the cell tracking at this time. One witnesses the vortex movement in the area of the hips.
PIV tracking of the movement, please notice that the vortex forms the classical rotational shape of the pelvis.
This is an in vivo movie of the continuation of the descent of "Hensen's node". Again, the formation of the pelvis roational shape is very conspicuous. Moreover, one notices that the pubic area fans asunder, forming a wide opening in the pubic area making possible the exit of eggs, large baby heads etc.
PIV tracking of the movement, please notice that the vortex has moved even more caudally. .
Animations continue. See more images and animations Go to mathematical formulas Mathematics of vortex flows

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La citation de la page : "C'est au moment oł l'on rejette tous les principes qu'il convient de se munir de scrupules ", Marguerite Yourcenar.