Noun:

முதுகுத்தண்டானது,

notochord தமிழ் அர்த்தத்தின் உதாரணம்:

நரம்புக் குழாய் வளர்ச்சியடையத் தொடங்கும்போது, முதுகுத்தண்டானது சோனிக் ஹெட்ஜ்ஹாக் அல்லது SHH எனப்படுகின்ற காரணியைச் சுரக்கத் தொடங்கும்.

உடல் வேறுநிலைக்கு மாறும்போது, அதற்கேற்ற சரியான நிலைக்கு உடலுடன் இணைக்கப்பட்டிருக்கும் முதுகுத்தண்டானது நகரும்.

notochord's Usage Examples:

In Asymmetron the caudal region is remarkable for the curious elongation of the notochord, which is produced far beyond the last of the myotomes.

After invagination is completed, the embryo begins to elongate, the blastopore becomes narrower, and the dorsal wall of the gastrula loses its convexity, and becomes flattened to form the dorsal plate, the outer layer of which is the primordium of the neurochord and the inner layer the primordium of the notochord.

) pc, Praechordal head-cavity of embryo; cc, collar-cavity (first somite); my, mesodermic somites (myocoelomic or archenteric pouches); ch, notochord with the neural tube (neurochord) lying upon it; np, anterior neuropore; ne, position of posterior neurenteric canal.

They are the only pelagic forms that have a notochord and they retain it throughout their lives.

The forms of batrachians with which we are acquainted show the vertebral column to have been evolved in the course of time from a notochordal condition with segmented centra similar to that of early bony ganoid fishes (e.

The tentacles are always solid, containing an axis of endoderm-cells resembling notochordal tissue or plantparenchyma, and are but moderately flexible.

8), seen in solid tentacles as a row of cubical vacuolated cells, occupying the axis of the tentacle, greatly resembling notochordal tissue, particularly that of Amphioxus at a certain stage of development; as a fourth variety of endodermal cells excretory cells should perhaps be reckoned, as seen in the pores in the foot of Hydra and elsewhere (cf.

It has, in fact, become metamorphosed into a resistant supporting structure resembling in some respects the notochord of the true Chordata, but probably not directly comparable with the latter structure, being related to it solely by way of substitution.

- anp, Anterior neural pore; be, rudiment of buccal skeleton; c, cilia; cb, ciliated band; cc, ciliated groove; cm, cilia at margin of mouth; gl, external opening of club-shaped gland; Hn, Hatschek's nephridium; lm, left metapleur; n, notochord; pp, praeoral pit; ps, primary gill-slits, I, 5, and 13; rm, right metapleur showing through.

- As has already been indicated, a solid subcylindrical elastic rod, the notochord, surrounded by a sheath of laminar connective tissue, the cordal sheath, lies above the alimentary canal in contact with its dorsal wall, and extends beyond it both in front and behind to the obtusely pointed extremities of the body.

Synonyms:

back, urochord, spinal column, vertebral column, spine, rachis, backbone,

Antonyms:

disapprove, front, fore, anterior, negate,