At the beginning of the __________ stage, the developing child has three distinct layers: the ectoderm, endoderm, and mesoderm.

Question

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During the embryonic stage, there are three layers of the embryo. The ectoderm will form skin, hair, teeth, sense organs, and the brain. The endoderm will form the digestive system, liver, pancreas, and respiratory system. The mesoderm will form the muscles, bones, blood, and circulatory system.

At the Beginning of the __________ Stage, the Developing Child