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
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 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
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 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
Peripherd Primitive Neuroectodermal Tumors: A Report of 7 Cases and a Review of Literature;
外周性原始神经外胚层瘤7例报告和文献分析
Clinical Features and Therapies of Peripheral Primitive Neuroectodermal Tumors (pPNETs)
外周原始神经外胚层肿瘤临床特点及治疗
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
Ewing's Saroma/Primitive Neuroectodermal Tumor of Hip:A Clinicopathological Study
臀部尤文肉瘤/原始神经外胚层瘤临床病理观察
Clinical analysis of 9 cases of central primitive neuroectodermal tumors
9例中枢性原始神经外胚层肿瘤临床分析
Analysis of saliva from the patients with hypohidrotic ectodermal dysplasia
少汗型外胚层发育不良症患者全唾液分析
Clinical parameters of middle-age and elderly primitive neuroectodermal tumor patients and their relationship with time-to-progression:analysis of 12 cases
中老年原始神经外胚层肿瘤12例临床报告
Prognostic factors of primitive neuroectodermal tumor
原始神经外胚层肿瘤化疗患者预后的研究
Research progress in the genes and proteins of hypohidrosis ectodermal dysplasia
少汗型外胚层发育不良症相关基因及其蛋白
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
Treatment of childhood peripheral primitive neuroectodermal tumors by CDV and IE chemotherapy
联合CDV与IE化疗方案治疗儿童外周原始神经外胚层肿瘤
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
The outer layer of a diploblastic animal, such as a jellyfish.
外层双胚层动物的外层，如海蜇