DescriptionEctoderm-ar.png النسج المشتقة من الأديم الظاهر Date 28 July 2019 Source File:Ectoderm.png Author Derivative: User:Nada Mawaldi Other versions
which the neural tube has formed but has not separated from the surface ectoderm.png Fig. 43. — A. Diagram of a transverse section of a zygote, in which the