Vertebrates are thought to have emerged during the Cambrian ... He points out that the fossils seem to be missing a notochord—a rod typically found behind the neural tube in chordates, which provides ...

Imagine a world where the boundaries between “fish” and “not-fish” blur, where the ancestors of birds and mammals once swam ...

In most creatures with backbones, vertebrae replace the notochord in the embryonic stage of development. But the coelacanth has no fully formed vertebrae, and so the notochord provides its ...

This element gave rise to the centrum in amniotes. At anterior end, below the notochord, is the intercentrum. Ichthyostegids (labyrinthodont amphibians) had vertebrae nearly identical with ...

To create a lab-grown notochord, researchers first studied chicken ... on the causes of birth defects affecting the spine and ...

When Schwann heard about the nucleus, he realized that he had seen a similar structure in the vertebrate notochord—a rodlike structure in the embryo that develops into the spinal column. Sure enough, ...

Chordoma is a very rare, slow growing type of bone cancer. Chordomas grow from the notochord. The notochord forms the early spinal tissue in a baby developing in the womb. During development, the ...