Nerve cord may refer to the following structures: in invertebrates, it refers to the
ventral nerve cord, whereas; in chordates, it stands for the dorsal nerve cord.
Dec 29, 2014 ... Nerve cord is a term that can refer to either (1) the single, hollow, fluid-filled,
dorsal tract of nervous tissue that is one of the defining ...
Nerve cord definition, a single hollow tract of nervous tissue that constitutes the
central nervous system of chordates and develops into the spinal cord and brain
1 : the pair of closely united ventral longitudinal nerves with their segmental
ganglia that is characteristic of many elongate invertebrates (as earthworms).
...first to develop a central nervous system with a brain. The nervous system of a
free-living flatworm such as Planaria consists of a brain, longitudinal nerve cords
Main Entry: nerve cord. Function: noun 1 : a pair of closely united nerves that run
along the inside of the body on the lower side of many long-bodied ...
An earthworm's ventral nerve cord carries signals from the brain to the body and
allows for the coordination of the ganglia in each segment past the fourth.
nerve cord. Also found in: Medical, Encyclopedia. Related to nerve cord:
notochord. nerve′ cord`. n. 1. the hollow dorsal tract of nervous tissue that
Animals in the phylum Chordata share four key features: a notochord, a dorsal
hollow nerve cord, pharyngeal slits, and a post-anal tail.
The dorsal nerve cord and the notochord are two very different types of tissue.
The dorsal nerve cord develops from ectoderm which becomes nervous tissue ...