1.
Any of the blastomeres from which the ectoderm develops.
外裂球任一种发育成外胚层的裂球
2.
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
3.
The outer layer of a diploblastic animal, such as a jellyfish.
外层双胚层动物的外层，如海蜇
4.
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
5.
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
6.
A protective sheath enclosing the shoot tip and embryonic leaves of grasses.
胚芽鞘裹在草的芽尖和胚芽外层的保护鞘
7.
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
8.
A protective sheath enclosing the embryonic root of grasses.
胚根鞘裹在草的芽根外层的保护鞘
9.
In Vitro Culture of Trophoblast Giant Cells from Bovine Placentomes
牛胚胎滋养层巨细胞的体外分离培养
10.
The outermost layer of cells of the blastocyst that attaches the fertilized ovum to the uterine wall and serves as a nutritive pathway for the embryo.
胚胎滋养层囊胚细胞的最外层，它会将受精卵与子宫壁连在一起，同时它是胚胎获取营养的通道
11.
The infolding of a portion of the outer layer of a blastula in the formation of a gastrula.
肠套叠在原肠胚形成过程中囊胚的外层的折叠部分
12.
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
13.
Prognostic factors of primitive neuroectodermal tumor
原始神经外胚层肿瘤化疗患者预后的研究
14.
Study on clinical parameters and prognostic factors of 23 cases with primitive neuroectodermal tumor
原始神经外胚层肿瘤化疗相关因素的研究
15.
Effects of Granulosa Cell Monolayers on in vitro Development of Cattle Parthenogenetic Embryos
颗粒细胞单层对黄牛孤雌胚胎体外发育的影响
16.
Any of the blastomeres of an embryo from which the endoderm develops.
内胚层指任何可生长成内胚层的胚胎分裂球
17.
The Diagnostic and Therapeutic Value of CT and MR in Peripheral Primitive Neuroectodermal Tumor of the Head and Neck
CT及MRI在头颈部外周原始神经外胚层瘤诊治中的价值
18.
double-walled stage of the embryo succeeding the blastula.
囊胚发育之后的双层胚胎。