from The Century Dictionary.
- Pertaining to the neuron and to the enteron; connecting the neural canal with the enteric tube.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Anat.) Of or pertaining to both the neuron and the enteron. See
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective anatomy Of or relating to the
neuronand the enteron.
from Wiktionary, Creative Commons Attribution/Share-Alike License
The medullary canal continues for a short distance (about fifteen sections of five microns thickness) posterior to the opening of the neurenteric canal.
As is shown in figure 3D, the neurenteric canal, _nc_, still opens ventrally, though the medullary canal, _mc_, has now no dorsal opening to the exterior.
After the coalescence of the neural folds over the anterior end of the primitive streak, the blastopore no longer opens on the surface but into the closed canal of the neural tube, and thus a transitory communication, the neurenteric canal, is established between the neural tube and the primitive digestive tube.
The majority are developed in relation to the communication which exists in the embryo between the neural canal and the alimentary tract -- the post-anal gut or neurenteric canal.
# -- The _post-anal dimple_, a shallow depression frequently observed over the tip of the coccyx, may be due to traction exerted on the skin at this spot by the remains of the neurenteric canal, or by the caudal ligament of
These medullary swellings join together over the furrow, and form a tube; in this case, again, the neural or medullary tube is at first open in front, and connected with the primitive gut behind by the neurenteric canal.
In the amniotes this original curved form of the neurenteric canal cannot be found at first, because here the primitive mouth travels completely over to the dorsal surface of the gastrula, and is converted into the longitudinal furrow we call the primitive groove.
Again, we find the neurenteric canal in just the same form and situation in the amphibia.
The medullary tube would be originally a chemical sensory organ, a dorsal olfactory tube, taking in respiratory-water and food by the neuroporus in front and conveying them by the neurenteric canal into the primitive gut.
In the earlier stages the alimentary tube is found to be entirely closed, after the closing of the primitive mouth; it only communicates behind by the neurenteric canal with the medullary tube.