It’s to little I can not see it
They help convert nitrogen to nitrate which is usable by living beings. (Living beings can't use regular nitrogen)
It controls all the involuntary actions like digestion and beating of our heart
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The development of the human embryo follows fertilization, and continues as fetal development. By the end of the tenth week of gestational age the embryo has acquired its basic form and is referred to as a fetus. The next period is that of fetal development where many organs become fully developed.