The cell layer between the ectoderm and endoderm, it develops into the circulatory, reproductive, and excretory systems. Mesoderm is the middle layer of an embryo that forms muscles, bones, and other internal organs.
Mesoderm: The cell layer between the ectoderm and endoderm, it develops into the circulatory, reproductive, and excretory systems. Mesoderm is the middle layer of an embryo that forms muscles, bones, and other internal organs.
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