英德
有道
百度
谷歌
图片
维基
百科
胚层学说
germ layer theory
- 上皮外未发现EC细胞，作者赞同肠道内分泌细胞的内胚层起源学说。
They had never been found elsewhere but in the intestinal epithelium and this phenomenon supports the theory that EC cells are derived from endoderm.
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