Multiple Choice
During the period of the embryo, the muscles, circulatory system, and bones develop from the
A) endoderm, the inner layer of the embryonic disk.
B) mesoderm, the middle layer of the embryonic disk.
C) ectoderm, the outer layer of the embryonic disk.
D) the placenta, which connects the embryo to the mother.
Correct Answer:
Verified
Correct Answer:
Verified
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