epiplasts

例句：

1. 1.The embryonic development of the human body is divided into four main stages: ectoderm, mesoderm, endoderm, and placodes.
   人类胚胎发育分为四个主要阶段：外胚层、中胚层、内胚层和板状体。
2. 2. During the formation of the vertebrate nervous system, the neural plate undergoes a series of transformations to eventually giverise to the brain and spinal cord.
   在脊椎动物神经系统形成过程中，神经板经历了一系列的转变，最终形成了大脑和脊髓。
3. 3. Epiblasts are the cells that form the outer layer of the developing embryo, which will eventually become the skin, muscles, and other tissues.
   外胚层是正在发育的胚胎形成的外层细胞，这些细胞最终将变成皮肤、肌肉和其他组织。