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neurula

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neurula /neu·ru·la/ (noor´u-lah) the early embryonic stage following the gastrula, marked by the first appearance of the nervous system.
neu·ru·la (nr-l, -y-l)
n. pl. neu·ru·lae (-l)
An early stage of embryonic development in which neurulation begins.

neurula
[noo͡r′ələ] pl. neurulas, neurulae
Etymology: Gk, neuron, nerve
an early embryo during the period of neurulation when the nervous system tissue begins to differentiate. The embryo at this level of growth represents a third stage in embryonic development, after the morula and blastocyst stages in humans and higher animals and the blastula and gastrula stages in lower animals. In humans the neurula stage occurs from about 19 to 26 days after fertilization.

neurula [noor´oo-lah]
the early embryonic stage following the gastrula, marked by the first appearance of the nervous system.

neurula
the early embryonic stage following the gastrula, marked by the first appearance of the nervous system.


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The early neurula is finished with formation of the expressed nervous plate and a cavity of a primary gut.
A twofold destructive/proliferative action of injury itself is fundamental in the organizative phenomena during the late blastula, gastrula and neurula stages, as shown in the Bufo arenarum species when specimens are submitted to experimental exogenous injury.
 
 
 
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