The primitive node (or primitive knot) is the organizer for gastrulation in most amniote embryos. In birds, it is known as Hensen's node, and in amphibians...

responsible for initiating and coordinating the heartbeat Primitive knot or primitive node, the organizer tissue for gastrulation in vertebrates The place...

the cranial (anterior) end of the disc, the primitive streak expands into an area known as the primitive node which is the organizer for gastrulation. In...

central pair of microtubules are found in the cells of the embryonic primitive node; termed nodal cells, these nodal cilia are responsible for the left-right...

fish, and the primitive streak in birds and mammals. Each is controlled by the dorsal lip and primitive node (also known as Hensen's node), respectively...

by way of the primitive streak which establishes bilateral symmetry. A primitive node (or primitive knot) forms in front of the primitive streak which...

The progenitor notochord is derived from cells migrating from the primitive node and pit. The notochord forms during gastrulation and soon after induces...

of the epiblast to the center midline. The primitive node is situated at the anterior end of the primitive streak and serves as the organizer for gastrulation...

serves as the basis for the nervous system. Cranial to the primitive node of the embryonic primitive streak, ectodermal tissue thickens and flattens to become...

knob-like thickening termed the primitive node or knot, (known as Hensen's knot in birds). A shallow groove, the primitive groove, appears on the surface...