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.外胚層
英汉例句
- Any of the blastomeres from which the ectoderm develops.
外裂球任一種發育成外胚層的裂球 - 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。
英英字典
- the cells in the embryo of a human or animal that develop into skin, hair, and the nervous system