胚层

They are bilateral symmetrical animals with a triploblastic body plan.

它们三胚层体制的两侧对称。

Two cell layers (diploblastic) separated by a gelatinous mesoglea.

两层细胞(两胚层)，凝胶状的胶层。

The primitie mouth, or stomodeum, is a slight depression on the surface of the ectoderm.

原始的口（或口凹）外胚层表面的一个轻微的凹陷。

Bone marrow mesenchymal stem cell(BM-MSC)is a early stem cell from the development of mesoblastema.

骨髓充质细胞(BM-MSC)一种来自胚层发育的早期细胞。

Dentinogenesis imperfecta (DI) is a kind of mesodermal defect inherited in a simple autosomal dominant mode.

摘要牙本质形不良一种体染色体显性遗传的胚层缺陷。

Ectodermal dysplasia appears in two froms, hidrotic and anhidrotic, according to clinical features and hereditary characteristics.

摘要外胚层异常症，依照临床表徵及遗传特性，可分型与出型两大类。

In the embryo an undifferentiated mesodermal component of an early trunk or tail segment or metamere, derived from paraxial mesoderm.

在胚胎时，一个法区别的胚层组一个早期躯、或尾部片段或体节，衍生自轴旁的胚层。

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鼻板，然后发展为额鼻隆起的下半部分。