ectoderm

常見例句

• Any of the blastomeres from which the ectoderm develops.
  外裂球任一種發(fā)育成外胚層的裂球
• 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麪的凹陷，發(fā)育成直腸的一部分
• Derived from two embryonic germ layers, the ectoderm and the endoderm. Used of lower invertebrates, such as sponges and coelenterates.
  雙胚層的具有兩個胚層（外胚層和內胚層）的。用於低等無脊椎動物，如寄生蟲和腔腸動物
• The resulting gastrula consists of an outer ectoderm, an inner endoderm, and a mesoderm layer positioned between them.
  最終原腸胚由一個外腸胚，內腸胚，和一個中腸胚搆成。
• The primitie mouth, or stomodeum, is a slight depression on the surface of the ectoderm.
  原始的口（或口凹）是外胚層表麪的一個輕微的凹陷。
• The outer layer of a blastula that gives rise to the ectoderm after gastrulation.
  外胚層囊胚的外層，在原腸胚形成之後生後外胚層組織
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