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1.Describe how the primary germ layers arise and give 2 examples of an organ or tissue...

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Medical Sciences

1.Describe how the primary germ layers arise and give 2 examplesof an organ or tissue that each develops into

2. In addition to the fetus, what other structures must theinitial “ball of cells” formed after fertilization develop into?Name two “extraembryonic” structures and explain their role in thepregnancy.

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3.9 Ratings (745 Votes)
1 Primary germ layers are ectoderm mesoderm and endoderm During gastrulation the embryo is in the form of by lamina disc with epiblast on top and hypoblast on bottom There is a prochordial plate at the cranial end of hypoblast Cells of epiblast migrate inwards and downwards and then differentiate This movement of cells form a primitive    See Answer
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