| 单词 | 外胚层 |
| 释义 | 〔epidermis〕The outermost layer of cells covering the leaves and young parts of a plant.外胚层：覆盖于植物叶面和萌芽之上的最外一层细胞〔diploblastic〕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〔mesoderm〕The middle embryonic germ layer, lying between the ectoderm and the endoderm, from which connective tissue, muscle, bone, and the urogenital and circulatory systems develop.中胚层：中间胚芽层，位于外胚层和内胚层之间，最终发育成结缔组织、肌肉、骨骼、泌尿系统及循环系统〔epiblast〕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〔ectomere〕Any of the blastomeres from which the ectoderm develops.外裂球：任一种发育成外胚层的裂球〔somatotype〕The structure or build of a person, especially to the extent to which it exhibits the characteristics of an ectomorph, an endomorph, or a mesomorph.体型：人体的结构或体格，尤其指展示其作为外胚层体型者、内胚层体型者或中胚层体型者特征意义而言者〔ectoderm〕The outermost of the three primary germ layers of an embryo, from which the epidermis, nervous tissue, and, in vertebrates, sense organs develop.外胚层：胚胎最初三层胚层中的最外一层，由此发育成为表皮、神经组织和脊椎动物的感觉器官〔gastrula〕An embryo at the stage following the blastula, consisting of a hollow, two-layered sac of ectoderm and endoderm surrounding an archenteron that communicates with the exterior through the blastopore.原肠胚：一种囊胚之后的胚胎，含有中空、两层的外胚层和内胚层，包围着通过胚孔跟外界交流的原肠〔somatopleure〕A complex sheet of embryonic cells in craniate vertebrates, formed by association of part of the mesoderm with the ectoderm and developing as the internal body wall.胚体壁：颅骨脊椎动物中一层复杂的胚体细胞，由部分中胚层及外胚层联合组成，形成身体内壁 |
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