nerve ring

nerve ring
Any ring of nerve fibers, may be around the mouth, esophagus, anus, bell margin, etc; see circumesophageal commissure.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • nerve ring — noun : a ring of nervous tissue; especially : a ring of concentrated nervous tissue about the pharynx of various invertebrate animals …   Useful english dictionary

  • circumesophageal nerve ring — (Class Ostracoda): Well developed ring of nerve tissue surrounding esophagus; consists anteriorly of supraesophageal ganglion, laterally of circumesophageal connective, and posteriorly of complex formed by subesophageal ganglion and more or less… …   Crustacea glossary

  • Nerve net — For the album by Brian Eno, see Nerve Net (album). Nettle Jelly A nerve net is a type of simple nervous system that is found in members of the cnidaria, ctenophora, and echinodermata phyla. Nerve nets consist of interconnected neurons lacking a… …   Wikipedia

  • ring nerve — see nerve ring …   Dictionary of invertebrate zoology

  • nerve pentagon — (ECHINODERMATA) The nerve ring around the mouth …   Dictionary of invertebrate zoology

  • nerve block — n 1) an interruption of the passage of impulses through a nerve (as with pressure or narcotization) called also nerve blocking 2) BLOCK ANESTHESIA * * * a method of producing anaesthesia in part of the body by blocking the passage of pain… …   Medical dictionary

  • Nerve — A bundle of fibers that uses electrical and chemical signals to transmit sensory and motor information from one body part to another. See nervous system. * * * A whitish cordlike structure composed of one or more bundles (fascicles) of myelinated …   Medical dictionary

  • Nerve (category theory) — In category theory, the nerve N(C) of a small category C is a simplicial set constructed from the objects and morphisms of C. The geometric realization of this simplicial set is a topological space, called the classifying space of the category C …   Wikipedia

  • ring — 1. A circular band surrounding a wide central opening; a r. shaped or circular structure surrounding an opening or level area. SYN: anulus [TA]. 2. The closed ( i.e., endless) chain of atoms in a cyclic compound; commonly used for “cyclic” or… …   Medical dictionary

  • Ring (jewellery) — A finger ring is a band worn as a type of ornamental jewellery around a finger; it is the most common current meaning of the word . Other types of metal bands worn as ornaments are also called rings , such as arm rings and neck rings.Rings are… …   Wikipedia

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