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When a multicellular organism is under its development how does the current outermost layer of cells "know" that they should not divide furthermore, as their bodyplan coded into DNA is already achieved. Is it because of morphogens or something else's work is in the background?

If it is entirely controlled by morpogens, than it would mean, that injecting a given morphogen to the outermost cells, would result in further increase in the organism's size?

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closed as unclear what you're asking by AliceD, WYSIWYG, The Last Word, fileunderwater, CKM Mar 24 '15 at 19:32

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ I don't understand your question. $\endgroup$ – canadianer Mar 23 '15 at 17:59
  • $\begingroup$ Could you please expand your question because in this form it is unclear what you're asking and I do not really understand your question either. $\endgroup$ – Nandor Poka Mar 23 '15 at 18:02
  • $\begingroup$ @FloriOn - I think it's ok for me, I think I get what you're asking $\endgroup$ – Nandor Poka Mar 23 '15 at 18:09
  • $\begingroup$ @FloriOn - It is your sole decision :) $\endgroup$ – Nandor Poka Mar 23 '15 at 18:17
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    $\begingroup$ @AliceD You are right, I have missed some important steps. But before the brain starts its development, the skull should be already in some place, for which it should have known the outer limit to its growing. I hope I am being clear here, as I am not sure about it. $\endgroup$ – FloriOn Mar 24 '15 at 6:13

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