Add sodium chloride injection to the germ layer medium.

菌层培养基加氯化钠注射液。

Methods: Add sodium chloride injection to the germ layer medium.

方法：菌层培养基加氯化钠注射液。

This suggests germ layer boundaries are less absolute than previously thought.

这表明胚层之间的界限并不是我们胰腺想想的那样严格。

The middle embryonic germ layer lying between the ectoderm and the endoderm from which connective tissue muscle bone and the urogenital and circulatory systems develop.

中胚层中间胚芽层，位于外胚层和内胚层之间，最终发育成结缔组织、肌肉、骨骼、泌尿系统及循环系统。

The middle embryonic germ layer, lying between the ectoderm and the endoderm, from which connective tissue, muscle, bone, and the urogenital and circulatory systems develop.

中胚层中间胚芽层，位于外胚层和内胚层之间，最终发育成结缔组织、肌肉、。