Embryonic germ layers are the fundamental organizing principle in animal development. They provide the structural basis from which tissues and organs arise. During early embryogenesis, cells divide to ...
A 25-day-old monkey embryo stained with fluorescent dye for visibility. Credit: Zhai et al/Cell/DOI 10.1016/j.cell.2023.04.019 Scientists have successfully nurtured lab-grown monkey embryos for 25 ...
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