Fertilization - Union of egg and sperm, Zygote - Fertilized egg, Cleavage - Rapid mitotic cell division of a zygote, Stem Cells - Cells that have not become specialized yet, Gastrula - Hollow ball of cells that is indented on one side forming 3 layers of cells , Development - Transition from zygote to a fully functional organism, Differentiation - Unspecialized cells of zygote develop into specialized tissues and organs, Placenta - Temporary organ where exchange of nutrients, gases, and wastes occur between mother and fetus , Umbilical Cord - Connects fetus to placenta, Amniotic Sac - Fluid filled sac that cushions the developing fetus from shock,

Fertilization and Development Terms

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