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- extraembryonic ectoderm 胚外外胚层
- 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 product of conception at any point between fertilization and birth.It includes the embryo or the fetus as well as the extraembryonic membranes. 胚胎从受精到出生期间任一阶段产物的通称，它包括了合子或胎儿甚至胚胎膜
- 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。
- Totipotent cell s have the capacity to specialize into extraembryonic membranes and tissues, the embryo, and all postembryonic tissues and organs. 全能细胞能够专门化胚外膜和组织，胚胎和所有胚胎后组织和器官。
- 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
- The product of conception at any point between fertilization and birth. It includes the embryo or the fetus as well as the extraembryonic membranes. 胚胎从受精到出生期间任一阶段产物的通称，它包括了合子或胎儿甚至胚胎膜。
- An individual having a lean, slightly muscular body build in which tissues derived from the embryonic ectoderm predominate. 瘦型体质者由胚胎胚层发育而成的组织形成的瘦型的、肌肉不发达的人
- The secondary yolk sac(YS) is the first extraembryonic structure that can be detected with ultrasonography in the chorionic cavity. 卵黄囊是妊娠囊内超声能见的第一个解剖结构。
- That is tosay, TaiYinQi corresponds to Endoblast, ShaoYinQi correspond to Mesoderm, JueYinQi corresponds to Ectoderm. 这就是太阴气与内胚层对应，少阴气与中胚层对应，厥阴气与外胚层对应。
- The remaining larger cells become columnar cells, the primitive ectoderm formation of embryos. 其余较大的细胞就变成柱状细胞，形成胚胎的原始外胚层。
- 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
- An individual having a lean,slightly muscular body build in which tissues derived from the embryonic ectoderm predominate. 瘦型体质者由胚胎胚层发育而成的组织形成的瘦型的、肌肉不发达的人
- 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
- Between the ectoderm and endoderm is mesoderm, which forms the muscles, reproductive organs, blood vessels and excretory organs. 在外胚层和内胚层之间是中胚层,它形成肌肉、生殖腺、血管和排泄器官。
- Bilateral oal thickenings of the surface ectoderm, called nasal placodes, then deelop on each side of the inferior part of the frontonasal prominence. 外胚层表面呈双边卵圆形增厚形成鼻板，然后发展成为额鼻隆起的下半部分。
- 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
