prim·i·tive node

a local thickening of the epiblast at the cephalic end of the primitive streak of the embryo (the node is an embryonic organizer).

Synonym(s): Hensen knot, Hensen node, Hubrecht protochordal knot, primitive knot, protochordal knot

Farlex Partner Medical Dictionary © Farlex 2012

prim·i·tive node

(prim'i-tiv nōd)

A local thickening of the embryonic disc or blastoderm at the cephalic end of the primitive streak of the embryo.
Synonym(s): Hensen node, primitive knot.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Hensen,

Victor, German anatomist and physiologist, 1835-1924.

Hensen canal - a short membranous tube passing from the lower end of a saccule to the cochlear duct of the membranous labyrinth. Synonym(s): Hensen duct; uniting duct

Hensen cell - one of the supporting cells in the organ of Corti.

Hensen disk - Synonym(s): Hensen line

Hensen duct - Synonym(s): Hensen canal

Hensen knot - a local thickening of the blastoderm at the cephalic end of the primitive streak of the embryo. Synonym(s): Hensen node; primitive node

Hensen line - the paler area in the center of the A band of a striated muscle fiber, comprising the central portion of thick filaments that are not overlapped by thin filaments. Synonym(s): H band; Hensen disk

Hensen node - Synonym(s): Hensen knot

Hensen stripe - a band on the undersurface of the membrana tectoria of the cochlear duct.

Hubrecht,

Ambrosius A.W., Dutch zoologist and comparative anatomist, 1853-1915.

Hubrecht protochordal knot - a local thickening of the blastoderm at the cephalic end of the primitive streak of the embryo. Synonym(s): primitive node