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Renin activates
Endoderm
The innermost layer of cells or tissue of an embryo in early development that gives rise to the lining of the digestive and respiratory systems.
Embryonic Stage
A critical phase in prenatal development that occurs from about the 2nd to the 8th week after fertilization, during which major organs and structures begin to develop.
Germinal Stage
The first—and shortest—stage of the prenatal period, which takes place during the first two weeks following conception.
Fetal Stage
The final stage of prenatal development starting from the ninth week of pregnancy until birth, where significant growth and maturation of the fetus occur.
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