Primitive groove

A shallow groove, the primitive groove, appears on the surface of the primitive streak, and the anterior end of this groove communicates by means of an aperture, the blastophore, with the yolk-sac.

单词	Primitive groove
释义	Primitive groove 英语百科 Primitive groove A shallow groove, the primitive groove, appears on the surface of the primitive streak, and the anterior end of this groove communicates by means of an aperture, the blastophore, with the yolk-sac.
随便看	Haussman Haussmann Haussmannian Haussmannise Haussmannization Haussmannizations Haussmannize haussmanns Hausstette Hausstock haust. haust haustella haustellate haustellation haustellum haustellum gallinago Haustellum haustellum haustellum hirasei haustellum kiiensis haustellum senkakuensis haustement Hausten haustorial haustorial root