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The Endowment for Human Development
The Endowment for Human Development
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Germ Layers and Organ Formation


14 days

From The Biology of Prenatal Development.Buy Now

Script: Apytikriai po 2 1/2 savaitės epiblastas būna suformavęs 3 specializuotus audinius, kitaip - gemalo sluoksnius, vadinamus ektoderma, endoderma ir mezoderma.

Iš ektodermos auga daug struktūrų, įskaitant smegenis, stuburo smegenis, nervus, odą, nagus ir plaukus.

Endoderma gamina kvėpavimo sistemos sieneles ir virškinimo traktą bei sukuria pagrindinių organų, pavyzdžiui, kepenų ir kasos, dalis.

Mezoderma suformuoja širdį, inkstus, kaulus, kremzles, raumenis, kraujo ląsteles ir kitas struktūras.

All ages referenced to fertilization, not last menstrual period.
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