In the embryonic stage,what is the term for the layer that forms the muscles,bones,blood,and circulatory system?

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The mesoderm is the layer of the embryo that forms the muscles, bones, blood, and circulatory system. The ectoderm forms the skin, nervous system, and sensory organs, while the endoderm forms the digestive and respiratory systems. The placenta is an organ that connects the developing fetus to the mother's uterine wall for nutrient and waste exchange.

In the Embryonic Stage,what Is the Term for the Layer