무료 CNS formation day 25-27 애니메이션

The neural tube is open anteriorly and posteriorly through which the lumen of the neural tube connects with the amniotic cavity. Anterior neuropore closes on day 25, which is the 18 to 20 somite stage. Posterior neuropore closes on day 28, which is the 25 somite stage. (NIH)(.gov)

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