neural groove मीनिंग इन हिंदी

उदाहरण वाक्य

1. It begins growing in a concave area known as the neural groove.
2. The neural plate folds outwards to form the neural groove.
3. As development proceeds, a fold called the neural groove appears along the midline.
4. The neural plate folds outwards during the third week of gestation to form the neural groove.
5. The neural groove gradually deepens as the neural folds become elevated, and ultimately the folds meet and coalesce in the middle line and convert the groove into the closed neural tube.
6. After recruitment from the ectoderm, the neuroectoderm undergoes three stages of development : transformation into the neural plate, transformation into the neural groove ( with associated neural folds ), and transformation into the neural tube.
7. Before the neural groove is closed a ridge of ectodermal cells appears along the prominent margin of each neural fold; this is termed the neural crest or ganglion ridge, and from it the spinal and cranial nerve ganglia and the ganglia of the sympathetic nervous system are developed.
8. The cephalic end of the neural groove exhibits several dilatations, which, when the tube is closed, assume the form of three vesicles; these constitute the three primary cerebral vesicles, and correspond respectively to the future fore-brain ( prosencephalon ), mid-brain ( mesencephalon ), and hind-brain ( rhombencephalon ).
9. The coalescence of the neural folds occurs first in the region of the hind-brain, and from there extends forward and backward; toward the end of the third week the front opening ( anterior neuropore ) of the tube finally closes at the anterior end of the future brain, and forms a recess which is in contact, for a time, with the overlying ectoderm; the hinder part of the neural groove presents for a time a rhomboidal shape, and to this expanded portion the term sinus rhomboidalis has been applied.