A longitudinal rod of cells in the embryo of a vertebrate that gives rise to the backbone of the adult.
Rod-like structure in the embryo that in humans and other vertebrates is replaced by the vertebral column.
A strip of mesodermal tissue that develops along the dorsal surface of the early embryo, beneath the neural tube. It becomes almost entirely obliterated by the development of the vertebrae, persisting only as part of the intervertebral disks.
An embryonic rod of cells lying dorsal to the intestine and extending from the anterior to the posterior end. The notochord forms the axial skeleton in embryos of all chordates. In vertebrates it is replaced partially or completely by the bodies of vertebrae. A remnant persists in humans as a portion of the nucleus pulposus of the intervertebral disk.
The elongated, rod-shaped embryonic tissue that serves as the foundation for the development of the vertebral column.