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Smooth muscle, connective tissue, and cartilage of primary bronchi are derived from which of the following sources?


A、Visceral mesoderm;
B、Endoderm;
C、Ectoderm;
D、Mesoderm of pharyngeal arches 4 and 6

发布时间:2025-12-22 03:06:09
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答案:Visceral mesoderm
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