外胚层遵循一个默认的路径。

Ectoderm follows a default pathway.

发育8天后，老鼠早期胚胎的，外胚层开始增厚。

This surface layer thickens at an early stage in a mouse after 8 days of development.

神经内分泌肿瘤是指具有分泌颗粒细胞的肿瘤，起源于神经外胚层。

Neuroendocrine tumours are tumours of cells which possess secretory granules and originate from the neuroectoderm.

芝麻籽大小的小蝌蚪现在已经分成了三层：外胚层、中胚层和内胚层。

The little tadpole about the size of a sesame seed is now made up of three layers: the ectoderm mesoderm and endoderm.

结果肿瘤含有横纹肌样细胞、原始神经外胚层、上皮及间叶多向分化成分。

Results The tumor containing rhabdoid cells, variable components of primitive neuroectodermal, epithelial and mesenchymal components.