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Chicken in the egg

FELIPE VIECELI/USPAt the very beginning of a chicken’s life, while still inside the egg (2.5 days old in the photo), the neural crest cells migrate to the regions of the body that at this stage are already creating various structures:  in the head, the facial nerves, below that, the neural ganglia of the trunk and, at the front, the heart, whose valves originate from these cells.  For Irene Yan’s team, the technique that allows these cells to be illuminated serves as a tool for detecting possible changes caused by experiments on the neural tube, precursor to the neural crest.

Photo sent by Irene Yan, Biomedical Sciences Institute of the University of São Paulo.

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