ectoderm
音标发音
- 英式音标 [ˈek.tə.dɜːm]
- 美式音标 [ˈek.tə.dɝːm]
- 英式发音
- 美式发音
基本解释
- n.外胚层
同根派生
英汉例句
- 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。
英英字典
- the cells in the embryo of a human or animal that develop into skin, hair, and the nervous system