Nerve chord

nerve chord: also called a spinal cord; a hollow structure that extends the length of the animal just above the notochord.
nerve impulse: an electrochemical event that occurs within the neuron.
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: A major phylum in the Kingdom
Animalia
. A chordate is characterized by the presence of a dorsal notochord at some stage of development and a dorsal hollow nerve chord.
Chromatid ...
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in the interior of the gastrula to form the mesoderm (schizocoelous development), but in deuterostomes it forms through evagination of the endoderm, called enterocoelic pouching. Deuterostomes also have a dorsal, rather than a ventral, nerve chord ...
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