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Germ Layers and Organ Formation


14 days

From The Biology of Prenatal Development.Buy Now

Script: Umbes kahe ja poole nädalaga on epiblastist moodustunud 3 erinevat kudet ehk lootelehte. Neid nimetatakse ektodermiks, endodermiks ja mesodermiks.

Ektodermist moodustuvad paljud struktuurid, kaasa arvatud peaaju, seljaaju, närvid, nahk, küüned ja juuksed.

Endodermist moodustuvad hingamisteede algmed ja seedetrakt ning seal moodustub osa tähtsamatest organitest, nagu näiteks maks ja kõhunääre.

Mesoderm moodustab südame, neerud, luud, kõhred, lihased, vererakud ja teised elundid.

All ages referenced to fertilization, not last menstrual period.
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