Plexus

A plexus (from the Latin for "braid") is a branching network of vessels or nerves. The vessels may be blood vessels (veins, capillaries) or lymphatic vessels. The nerves are typically axons outside the central nervous system.

This article is about anatomy term. For other uses, see Plexus (disambiguation).

The standard plural form in English is plexuses.[1][2][3]

Plexuses
The four primary nerve plexuses are the cervical plexus, brachial plexus, lumbar plexus, and the sacral plexus.
The choroid plexus is a part of the central nervous system in the brain and consists of capillaries, ventricles, and ependymal cells.

In invertebrates

The plexus is the characteristic form of nervous system in the coelenterates and persists with modifications in the flatworms. The nerves of the radially symmetric echinoderms also take this form, where a plexus underlies the ectoderm of these animals and deeper in the body other nerve cells form plexuses of limited extent.

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References
  1. Merriam-Webster, Merriam-Webster's Collegiate Dictionary, Merriam-Webster. Paywalled reference work.
  2. Merriam-Webster, Merriam-Webster's Medical Dictionary, Merriam-Webster. Paywalled reference work.
  3. Elsevier, Dorland's Illustrated Medical Dictionary, Elsevier, archived from the original on 2014-01-11, retrieved 2014-03-02. Paywalled reference work.
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