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سلول افتراقی
Here the differentiated cells divide but maintain their differentiated functions.
These clonogenic neoblast cells produce the differentiating cells of the regenerating flatworm.
If even one survives, a single clonogenic neoblast can divide to generate a colony of dividing cells that will ultimately produce the differentiated cells of the organs.
HEAD-TO-TAIL POLARITY As we saw with hydra, Wnt signaling appears to play a major role in establishing a polarity of differential cell fates.
When an adult salamander limb is amputated, the remaining limb cells reconstruct a new limb, complete with all its differentiated cells arranged in the proper order.
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