Magic embryology: placental forms before embryo (Introduction)

by David Turell @, Thursday, September 24, 2020, 20:39 (685 days ago) @ David Turell

Special cells in the earliest cell divisions are set apart:

https://phys.org/news/2020-09-placental-days-embryo.html


"In a study published today in the journal Nature, researchers looked at the biological pathways active in human embryos during their first few days of development to understand how cells acquire different fates and functions within the early embryo.

"They observed that shortly after fertilization as cells start to divide, some cells start to stick together. This triggers a cascade of molecular events that initiate placental development. A subset of cells change shape, or polarize, and this drives the change into a placental progenitor cell—the precursor to a specialized placenta cell—that can be distinguished by differences in genes and proteins from other cells in the embryo.

***

"The team also examined the same developmental pathways in mouse and cow embryos. They found that while the mechanisms of later stages of development differ between species, the placental progenitor is still the first cell to differentiate.

"'We've shown that one of the earliest cell decisions during development is widespread in mammals, and this will help form the basis of future developmental research...'"

Comment: Such a complex arrangement must be designed. Not by chance!


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