ectoderm

常见例句

• Any of the blastomeres from which the ectoderm develops.
  外裂球任一种发育成外胚层的裂球
• An inward fold on the surface of the embryonic ectoderm that develops into part of the anal passage.
  原肛肛道胚胎消化道表面的凹陷，发育成直肠的一部分
• Derived from two embryonic germ layers, the ectoderm and the endoderm. Used of lower invertebrates, such as sponges and coelenterates.
  双胚层的具有两个胚层（外胚层和内胚层）的。用于低等无脊椎动物，如寄生虫和腔肠动物
• The resulting gastrula consists of an outer ectoderm, an inner endoderm, and a mesoderm layer positioned between them.
  最终原肠胚由一个外肠胚，内肠胚，和一个中肠胚构成。
• The primitie mouth, or stomodeum, is a slight depression on the surface of the ectoderm.
  原始的口（或口凹）是外胚层表面的一个轻微的凹陷。
• The outer layer of a blastula that gives rise to the ectoderm after gastrulation.
  外胚层囊胚的外层，在原肠胚形成之后生后外胚层组织
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