胚层

They are bilateral symmetrical animals with a triploblastic body plan.

它们是三胚体制的两侧对称。

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

两细胞(两胚)，中间是凝胶状的中胶。

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

的口（或口凹）是外胚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.

骨髓间充质细胞(BM-MSC)是一种来自中胚发育的早期细胞。

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

摘要牙本质形成不良是一种体染色体显性遗传的中胚缺陷。

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

摘要外胚异常症，依照临床遗传特性，可分成无汗型与出汗型两大类。

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

在胚胎时，一个无法区别的中胚组成一个早期躯、或尾部片段或体节，衍生自轴旁的中胚。

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。