a tube of ectodermal tissue in the embryo from which the brain and spinal cord develop
neural tube的用法和樣例:
例句
These are not derived from the neural crest, instead an outpouching of the neural tube generates the optic cup which, in turn, forms the retina. 不過視網膜上皮的黑色素細胞是其中的例外,它們並非由神經脊產生,而是在神經管外囊生成的視杯產生。